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Hey all, I've had my Captivate now for afew days and I'm loving it, but today I ran across an issue that's driving me crazy.
For some reason when I connect it to my PC I'm not longer getting the Mount SD option on the phone and can't look at my files. I've enabled USB debugging and tried it. I've told it to come up as Mass Storage and tried it. I also told it to Ask when connected and it's still not working properly. The drives show up in Windows but cannot be accessed. I also no longer get the USB notification up in the notification bar.
The weird thing is sometimes if I restart the phone and connect it everything is fine, but then if I go to do it again nothing. Anyone have any suggestions?
Biggest misconception here is that its random, it isn't.
Download kies by samsung and update it and you will get the right USB drivers installed automatically.
If you choose not to do that, you'll Vast have to keep trying different ports or restarting.
Its also possible that you may have a faulty wire but this is unlikely.
systoxity said:
Biggest misconception here is that its random, it isn't.
Download kies by samsung and update it and you will get the right USB drivers installed automatically.
If you choose not to do that, you'll Vast have to keep trying different ports or restarting.
Its also possible that you may have a faulty wire but this is unlikely.
Click to expand...
Click to collapse
I've tried it with multiple wires, and when it works it is reliable, but most of the time it's just not showing a USB connection on the phone.
I spent awhile downloading Kies and it's updates and in Mass Storage mode it sees the drives of the phone but doesn't let me use them. I Kies mode it does nothing... This is so confusing...
Go in here download the drivers:
http://forum.xda-developers.com/showthread.php?t=728929
Be aware, they might take up to 15 minutes to install, and no KIE is not included.
Make sure you close all your apps on phone before connecting to PC. Few apps that use the SD will hold the resource and not allow for PC connection.
skizzz said:
Go in here download the drivers:
http://forum.xda-developers.com/showthread.php?t=728929
Be aware, they might take up to 15 minutes to install, and no KIE is not included.
Make sure you close all your apps on phone before connecting to PC. Few apps that use the SD will hold the resource and not allow for PC connection.
Click to expand...
Click to collapse
I downloaded those afew days ago but I will redownload and reinstall again just incase. I think the fact that the USB notification isn't showing up in the bar on the top of the phone is what's confusing me the most. Previously I would see the USB Icon and something would pop up saying I need to mount the drive. I would mount it and there would be no problem. Now I'm not getting that at all and I've tried Mass Storage, USB Debugging, Kies, and Ask.
I've never had a problem connecting my Captivate to my Windows 7 64 bit computer. I didn't install Kies or any drivers either. Not sure what all the fuss is about. I'm suspecting a lot of PEBCAK errors.
I'm starting to think there are some strange power requirements when connecting the phone to USB. Most of my systems have been fine but on one, when I connect the phone to the front USB ports, the USB Wifi adapter on the back simply stops working. While the phone is connected, the computer refuses to recognize the Wifi adapter. A soon as I disconnect the phone it starts working again.
I've seen people on other forums with intermittent issues getting the mass storage connection to work when connected to the front ports on their systems. A lot of times the front ports are connected through a USB hub in the computer case that doesn't deliver full power. If the phone isn't drawing enough power or is shunting power from other devices, this might explain the issues people are having.
Mine is acting up . I used both teh 5.02 drivers from samsung and the one linked here and similar results. In Samsung mode it goes to the Digital Still camera and flakes and on mass storage it shows two new drives..neither of which is writable or readable. This is on a cap with no SD card and XP sp3. I tried different ports but with the same result.
I was fighting with this all day. I installed, uninstalled, reinstalled all the drivers and kies, but, I was trying to connect via media player and nothing was happening. Then I noticed that there was a small message popping up on the Captivate's screen that said something about the device had to be on the idle screen before it would connect and fun the sync software. Tried turning off all running programs and still nothing. Then, I remembered that I had switched to Launcher Pro. I switched back to touch wiz, and lo and behold, it connected right up and allowed me to sync items with media player.
Interesting. I've been using ADW.Launcher and haven't see this problem except when I don't get the cable securely inserted into the Captivate. I even use a Nokia cable most of the time. The Kies Drivers are clearly the most stable. I downloaded the Drivers from the Captivate microsite and found they didn't support KIES, so I just reinstalled the KIES driver for MTP. Everything else works fine on W7x64.
++++UPDATE+++++ Validating MSHampton post
Well this sucks. On my Captivate, unless you are using TW.Launcher and in the idle screen, the Captivate won't launch MTP so you can connect to KIES. The USB Storage mode works with other Launchers (ADW and LaunchPro), but not KIES or Media. I didn't try PC Internet tethering. I switched between the two several times, and KIES only works with TW.Launcher on my device.
Is there anyone who knows of a Launcher OTHER than TW.Launcher that will interface with KIES so that the Captivate can connect? Or can ADW or LauncherPro be "tweaked" for the Captivate? I was just starting to like ADW.Launcher.
hitchb said:
[snip] Most of my systems have been fine but on one, when I connect the phone to the front USB ports, the USB Wifi adapter on the back simply stops working. While the phone is connected, the computer refuses to recognize the Wifi adapter. A soon as I disconnect the phone it starts working again.
[snip]
Click to expand...
Click to collapse
Holy crap, I have that EXACT same problem. I thought it was just the fact that my USB Wifi adapter is a piece if crap (which it is).
Just for reference, what kind is yours? Mine is a Belkin Wireless G F5D7050.
gtg465x said:
Just for reference, what kind is yours? Mine is a Belkin Wireless G F5D7050.
Click to expand...
Click to collapse
It's the Tenda 311U which is also a cheap piece of crap ($15 at Micro Center.) It doesn't look like they use the same chipset.
I've had the same issue as well. Hooking up the Captivate to the front USB ports disables my USB mouse (on the back). I'm not sure what it could be doing that would lock up the USB bus...
Using Windows 7 netbook
I finally got tired of it deciding and put in the mode to ask me when I connect. the problem i am having is when you just charge it, it does not know that it is just charging and wants to go to ysb mass storage or the other screen. also I use double twist to connect to the phone.
thanks
Jon
The best bet here is to use USB ports on the back of the computer.
Griffon23 said:
Hey all, I've had my Captivate now for afew days and I'm loving it, but today I ran across an issue that's driving me crazy.
For some reason when I connect it to my PC I'm not longer getting the Mount SD option on the phone and can't look at my files. I've enabled USB debugging and tried it. I've told it to come up as Mass Storage and tried it. I also told it to Ask when connected and it's still not working properly. The drives show up in Windows but cannot be accessed. I also no longer get the USB notification up in the notification bar.
The weird thing is sometimes if I restart the phone and connect it everything is fine, but then if I go to do it again nothing. Anyone have any suggestions?
Click to expand...
Click to collapse
If you're still having problems, select mass storage and connect the usb (or select ask every time and it will ask when you plug it in). To access the drive like a removable drive, you have to swipe the icon in the top right of the screen and select the usb selection. Then click mount and it should work! I had a hard time with this too and thought it wasn't very intuitive. Good luck!
joedoe said:
The best bet here is to use USB ports on the back of the computer.
Click to expand...
Click to collapse
Yep, strangely enough using the back ports worked. I'll have to see if a powered USB hub will work and then I guess we can conclude that it's a power issue.
mrbisme33 said:
If you're still having problems, select mass storage and connect the usb (or select ask every time and it will ask when you plug it in). To access the drive like a removable drive, you have to swipe the icon in the top right of the screen and select the usb selection. Then click mount and it should work! I had a hard time with this too and thought it wasn't very intuitive. Good luck!
Click to expand...
Click to collapse
I've set it to both Mass Storage and Ask every time and the problem I get is that I only get the USB icon up top sometimes, it's very rare. I've tried this on multiple ports and multiple PCs with the drivers downloaded and sometimes the notification shows up and I can select mount, but most of the time nothing is in my notification bar at all.
I love this phone but I don't understand why it's so frustrating just to connect it to a PC. I've also tried the Kies methods and it sees the phone, but doesn't let me access the files.
cellgeek said:
Interesting. I've been using ADW.Launcher and haven't see this problem except when I don't get the cable securely inserted into the Captivate. I even use a Nokia cable most of the time. The Kies Drivers are clearly the most stable. I downloaded the Drivers from the Captivate microsite and found they didn't support KIES, so I just reinstalled the KIES driver for MTP. Everything else works fine on W7x64.
++++UPDATE+++++ Validating MSHampton post
Well this sucks. On my Captivate, unless you are using TW.Launcher and in the idle screen, the Captivate won't launch MTP so you can connect to KIES. The USB Storage mode works with other Launchers (ADW and LaunchPro), but not KIES or Media. I didn't try PC Internet tethering. I switched between the two several times, and KIES only works with TW.Launcher on my device.
Is there anyone who knows of a Launcher OTHER than TW.Launcher that will interface with KIES so that the Captivate can connect? Or can ADW or LauncherPro be "tweaked" for the Captivate? I was just starting to like ADW.Launcher.
Click to expand...
Click to collapse
This just solved my kies and windows 7-64bit issue. This should be sticked advice or added to the wiki.
USB Setting no PC- Connection
I just got my AT&T captivate and I notice that under application,usb setting I don't have the PC-internet option in there. This is only what I have under USB setting:
Kies(Firmware update)
Media Player
Mass storage
Ask on connection
So, question is, how do I enable the pc-internet option? Any suggestion I really appreciate.
Sam
My Samsung Intercept wont connect to my computer, everytime I plug it in, I get USB device not recognized, how can I get it to be recognized? Im running android 2.2.1, and my computer is running Windows 7 Ultimate 64-Bit
I tried posting a link but the spam prevention police apparently wont let me post links until I have 8 posts. So I'll just quote:
First I tried to use Win 7′s XP mode, which was a total failure. The Windows stock Virtual PC cannot control any devices, it just reads them as belonging to the real computer. After a lot of searching I found the open source Oracle Virtual Box, which is Windows Virtual PC on crack. With Virtual Box, you can mount any number of operating systems to play around with. As a bonus it has the capability to see external devices as its own. All you need is an install disk for your operating system of choice. I had gotten the Intercept to work with both XP and 7 32 bit, so I chose to install a Win 7 32 virtual machine.
For all the specifics on how to install a virtual operating system in Virtual Box, read the user manual. Its large and technical, but skimming the first two chapters should tell you all you need to know to get started. The short version, you set up a partition for your virtual machine, you then “boot” the virtual machine with the install disk of your operating system of choice. You then go through all the normal installation steps, and bingo-bango you now have a virtual copy of XP/7/whatever.
Here is where things get hazy. I was under the impression that the virtual machine would be where I would see the phone. However for mysterious reasons, suddenly the phone now gives me the option to mount and my main Windows 7 64 has no problem letting me into the phones drive!
I don’t know why. I can close the virtual machine and still have access when I plug in. I wish I knew what the heck was going on and how a virtual 32 bit 7 convinced a real 64 bit 7 that the Intercept is OK, but I do not. All I know is that Virtual Box somehow worked for me, perhaps it can work for you. Other than that Virtual Box is a nifty tool I should have had long ago. Good luck!
UPDATE: I wrote this a couple months ago and while it did work, I have a funny feeling that its all just pure luck as to if Windows will bother to recognize the phone. I have computers it works fine on and some that refuse to see the phone no matter what I do. The whole key is to just keep trying, something will work eventually. If all else fails get an app like SwiFTP and move on with your life.
Click to expand...
Click to collapse
Retrieved from wordpress.
Thank you very much for this information, I will get to trying the Virtual Box and the SwiFTP, thank you again.
The above information you gave still didnt work :/, do you or anyone else know what I could do to fix?
Hello, I wanted to say that the whole process for the computer to see the Samsung Intercept is buggy to say the least. I have a good knowledge base of computers as I work as a Desktop Support technician for the past 10 years. I read many posts and replies. None seem to be concrete on a resolution. I tried the usual methods. I downloaded the Samsung SWUpdate+Patch. I downloaded the Sprint USB Modem drivers from Samsung's Web site. I also downloaded the custom files for the Kernel and custom recovery. The first thing I tried on all four of my computers was to install the Samsung USB Modem drivers. The second thing I did was to install the SWUpate+Patch software. My first test computer was a Compaq D500 desktop. Windows XP-SP3 with USB 1.0 ports and a USB 2.0. I placed my phone in USB Debugguing Mode. I then powered off my Phone. I held down the three magic keys to get the phone in "Download" mode. I checked Add/Remove Programs both programs were installed- Samsung USB Modem Driver and the SWUpdate. I first opened the Samsung SWUpdate program. I followed the onscreen instructions of the Samsung program. The program could not communicate with the phone. Bottom right corner of the program said disconneted. I tried chaning the Port Settings in the program to COM1, COM2, etc. All said disconnected. I tried opening the Samsung program several times. Restarting the phone, unplugging the battery etc. I also tried using a different USB cable besides the one that came with the phone. No communication. I tried the same process on another PC which had Win7Pro 32Bit SP1. Almost same results, but I had the computer install these three devices when I opened the Samsung program and connected my phone:Android UMS, S3C6410 Android ADB, CDC Abstract Control Model (ACM) I thought I was good. Status still Disconnected. I restarted the computer tried the whole process again. This time the computer gave me three messages of "Device not Recognized." So I tried a few more different was to get the drivers into Device Manager nothing worked. I even tried that PDA2net app that app wouldn't see the phone wither. Then I looked into the PDA2net directory and saw some drivers .INFs that I thought might work.. I would get a little farther, but then the driver seemed to install and partially recognize the devices, but then a message said that it could start "Error 10" So I tried another computer. Windows 7-64bit. I knew this was going to be a long shot..and it was.. Samsung USB Modem Driver not supported on this version of Windows. So I tried my work computer Win7Enterprise 32Bit. Same issues Device not recognized three or four times. I tried the two USB cables for my phone the OEM one and Aftermarket. No luck. So I had my old trusty Dell D600 laptop. WinXP-SP3 32bit USB 1.0. I installed the Samsung USB Modem driver then the Samsung SWUpate app. I got my Recover.tar file dropped into the Bin dir. I opened the Samsung SWUpdate app and holy **** the damn program was able to connect to my phone I couldn't believe it.. I wanted to take a screen shot of it working just so I could make sure it wasn't B.S. I used my laptop with an Aftermarket USB Cable. I'm not sure if it's a Data USB cable or just a charging cable. I don't think there is two different cables as I've read many times on different fourms. I'm not sure why my laptop works with the phone. When my phone did finally connect it connected on COM3. So maybe it's a port setting/IRQ. I also turned off my Firewall each time just incase it was blocking communication.
If anyone has any questions please feel free to reply. I will try to help in any way possible. I wanted to say thanks to XDA Forum and to Super-6-1 on YouTube..you guys Helped Me more than you know.!!!!!
Hi all, Ive had my captivate for about a week now and have been playing with it, I've been all over the web trying to figure out why I can't sync it with my pc Ive tried both my laptop with windows 7 and my desktop running XP. Nothing will work ive downloaded the drivers from Samsung's site and kies and kies mini with no luck. No matter what i do it says device not recognized windows has stopped the device and nothing shows up on the phones screen it just shows its charging, I'm guessing its something I'm doing but i just don't know what. Once I had so much trouble I connected a Samsung flight to my PC that's running XP and it worked just fine. Can anyone help me out i want to root the captivate so i can get take off all this att crap!!!
Did you mount the phone after plugging it into your computer? You should pull down the notification bar and it should give you the option to copy files to/from computer.
Also, set you usb settings to mass storage. It's in settings...can't remember where on stock.
Sent from my SGH-I897 using XDA App
Yes I have put the phone in all the different usb settings debugging,media player, mass storage, ask on connection, kies. When I plug it in the only thing that changes on the phone screen is its showing its charging it doesn't give me any option to mount. The same cable will connect my old Flight phone and that phone transfers files just fine. This really has me stumped.
You downloaded and installed drivers from this site? http://www.samsung.com/us/support/downloads/SGH-I897ZKAATT
This may sound random and stupid but are you plugging into a USB that is directly connected to the motherboard (back of the computer)? If you're on a laptop there is no way to test this...basically, there was some issues before of people not having their computer recognize their phone and the issue was too low of power from the USB.
Hopefully someone else can chime in as well. I'm pretty new to this too so I can only think of fairly basic things.
I posted this on a forum that I thought it applied to but the one answer I got did not work, I've done searches everywhere and have not seen a solution. There were a couple of similar problems for other phones but these fixes did not work for the infuse, so . . .
I Bought the infuse on day one. Installed Kies 2.0.0.11044_11_3. Phone not recognized, installed drivers, researched and learned the truth about Kies. Phone would not be recognized but at least installing Kies made the phone visible to the PC, so I knew I could root if I so desired, read up about rooting looked over the forums, learned my phone and finally thought I was ready. The phone had other plans.
Decided the other day that I was ready to root. Plugged in the phone but it no longer showed up in my PC running Windows 7 64 bit. Something about the phones compatibility with my system changed. Tried to install a newer version of Kies 2.2.1.11053_99_3 yesterday for the drivers, reinstalled drivers, activated USB debugging, plugged the phone in started up SuperOneClick and . . . still nothing happened. So I deactivated USB debugging and started over. Followed all the directions in the root posts and and SuperOneClick threads . . .
But somehow between day one and today my Windows 7 64 bit system does not know that the phone is plugged into it.
When I plug the phone into USB the phone asks me how I want to interact with the computer, Kies (Firmware Update); Media player: Mass storage. But the computer shows nothing. Device Manager doesn't list the phone, Windows Explorer doesn't show the phone, Devices and Printers window shows everything that's connected but NOT the phone, it's as if I plugged nothing into the computer. These places don't even show unknown device. The phone is charging so I know that it's plugged in, but it doesn't seem to be communicating with the PC. I've re-booted, re-installed, reviewed, rewired and re-alized that I have no clue what happened. (Tried different cables, different USB ports different times of the day)
It worked once upon a time, I tried rolling back restore points and disabling my kaspersky 2011, I've followed all rooting instructions in these threads to no avail.
Thinking about restoring phone to factory settings as a last resort. Got this reply in another thread (sorry about posting multiple threads, but I'm at wit's end.):
Try removing all instances of the Infuse coming in contact with your system using USBDeView. Also, how does it look in Disk Management? (Start button > search for "Computer Management" > Storage > Disk Management) Does the Infuse show up there as removable storage?
My answer: Tried it, didn't work, oh wait, didn't run USBDeView as administrator, re-tried as administrator and uninstalled all instances of Samsung i-997, then tried to plug the phone back in and still nothing.
Also not in Computer Management or Device manager either. Is there a way to uninstall any drivers that I have and then re-install them?
I did a factory reset, plugged the phone in and still nothing. Had to spend two days re-installing apps and re-configuring launchers . . .
I am now ready to hurl my phone out into traffic to see if that will help, but before I do I'm hoping someone here may have the answer I need.
. . . please . . .
If you are trying to root super one click will work. It worked on my infuse. First see if you can connect using mass storage. If you can access the files on your phone you are good. On win 7 64 bit it should just pop up to view the files. After that unmount and unplug the cable. Enable USB debugging and reconnect. Run super one click and it should work. Not every time does super one click work on the first run. I believe I had to unplug and reconnect a second time for it to work. But I did use super one click to root my phone. I was also using the drivers for the captivate at the time. If you need more help let me know.
Sent from my SAMSUNG-SGH-I997 using XDA App
FYI, drivers are NOT needed for USB mass storage, just to be clear.
Thanks for the reply, but that didn't work. I tried it exactly as you stated but it didn't "pop up" I ran SOC anyway and it got hung up "Waiting for device..." And a dos prompt window opened and just hung there.
SuperOneClick v1.9.5.0
Checking drivers...
Killing ADB Server...
OK
Starting ADB Server...
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
OK
Waiting for device...
When I closed the Dos Prompt window it asked me if I was running OS 2.0 or higher. Wether I click yes or no I get this message:
OK
Getting OS Version...
Pushing psneuter...
error: device not found
FAILED
Thanks for the try, but still At wit's end . . .
it mattters
at least for me (win7 64bit) mass storage mode DOES require drivers. Or else PC just tries to load both SD cards as external drives. I had a hell of a time getting my laptop to recognize the phone. What worked for me was I ended up installing both kies and kies mini. when neither of those worked i tried the Samsung pcl connect and that didnt work. There was a link on the ATT site for usb drivers for it. A combination of both the samsung pc connect drivers and the ATT USB driver works for me. Must be something to do with win7 recognizing it as an MP3 player when in music mode and a EXT drive when is mass storage.
socialal said:
at least for me (win7 64bit) mass storage mode DOES require drivers. Or else PC just tries to load both SD cards as external drives. I had a hell of a time getting my laptop to recognize the phone. What worked for me was I ended up installing both kies and kies mini. when neither of those worked i tried the Samsung pcl connect and that didnt work. There was a link on the ATT site for usb drivers for it. A combination of both the samsung pc connect drivers and the ATT USB driver works for me. Must be something to do with win7 recognizing it as an MP3 player when in music mode and a EXT drive when is mass storage.
Click to expand...
Click to collapse
You just contradicted yourself there. The phone's SD cards appearing as external drives IS mass storage mode. Mass storage mode does not require drivers.
Appearing as an MP3 player uses the MTP protocol, which is NOT Mass Storage mode, which is why it does require drivers.
ADB also requires drivers.
http://www.samsung.com/us/support/downloads/SGH-I997ZKAATT
Thanks, but same problem. After installing these drivers, the phone just doesn't show when plugged in. The next thing is to find a Samsung store (or AT&T store) and see if there's something wrong with the phone's usb port.
Definitely one advantage of picking your phone up at a store... if possible.
My CSR played with the phone on the computer for 10 min., said he was transferring sim contacts.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
i am having same problems
for the past year i have had a captivate and i have flashed it probably with every rom made by every developer here. i have flashed kernals modems you name it i have done it the phone was incredible i never had one problem till i got the infuse when i first got the phone i rooted it and had a lot of problems but after 5 or 6 hrs i finally was successful. i then could not get the phone to connect to my win 7 pc i then took out the mem card and put my roms on that then transfer them to my phone flash ect but to this day i can not get the pc to transfer files through usb. when i hook the phone up the drives show up but are faint then i connect usb on phone the drives become bold but when i try to transfer files or open drive in explorer the computer lags and the green bar slowly goes across the bar get to the almost end and locks up. my main concern is that there might be something wrong with the phone. at this point i cant even odin it back to factory. from what i have read it is more of a common problem than just one or two people. please help?
ps just flashed maxq-kk2-b10 and it rocks !!
Yeah I have all of the same problems. It must be this phone just has crap drivers.
Sometimes I get the PC to recognize the phone once. Then if I disconnect the phone for some reason then reconnect it is no longer recognized. I need to reboot the computer to get it to be recognized.
I have just come to the conclusion that Samsung's PC drivers are total rubbish for this phone.
Hi!
I have the same problem. I tried connect my infuse to 5 differend PC, with different cables, different OS, but still NOTHING. PC just didn`t know that phone is connected. As a result I can`t reflash it with ODIN or CWM, because for install CWM I need make root first, but Superoneclick didn`t see the phone also.
There is some way to make root on this phone WITHOUT connection to PC ?
try getting a new data cable, the charging part of the cable may still work but the data transfer part may have stopped working-(happened with my dads Atrix 4G after buying a new data cable for $6 at walmart the computer once again recognized it)
so go to your store of preference that sells electronic cables
buy a new data/charging cable-***MAKE SURE IT SAYS SOMETHING ABOUT DATA TRANSFER OR FILE TRANSFER!!!***
shouldn't cost more than $10 depending where you go-like i said my dad got one for $6 and his phone uses the same cable as my infuse...i think all smart phones use the same cable actually.
mg2195 said:
try getting a new data cable, the charging part of the cable may still work but the data transfer part may have stopped working-(happened with my dads Atrix 4G after buying a new data cable for $6 at walmart the computer once again recognized it)
so go to your store of preference that sells electronic cables
buy a new data/charging cable-***MAKE SURE IT SAYS SOMETHING ABOUT DATA TRANSFER OR FILE TRANSFER!!!***
shouldn't cost more than $10 depending where you go-like i said my dad got one for $6 and his phone uses the same cable as my infuse...i think all smart phones use the same cable actually.
Click to expand...
Click to collapse
This is 100% not data cable problem. not driver problem and not PC problem.
I am sure, because I have 2 Infuse and one of them work fine with the same stuff. This is something wrong with the phone hardware or software.
How can I root INFUSE without PC? There is some *.apk or scripts ?
Hi, I just bought a universal USB OTG cable, and used it to connect a 32 GB pen drive (FAT32 filesystem) to my OPO (05Q, rooted). At first it apparently detected it, but since the drive was totally empty I had no way to confirm that, so I unplugged the drive and connected it to my PC, and put some videos on it. The computer gave a me a list of files with strange simbols as name, but I thought it was something done by the phone, given the presence of the directories "Android" and "LOST.DIR" (even though I wasn't allowed to open them). Then, I plugged the drive back to the phone, and it was detected without any problem, but it was completely empty, and not even a single bit of data could be found anywhere. I repeated the process three times, always with the same results. Does someone have a solution for this annoying issue?
Thank you very much.
Edit: Problem solved, it was an issue of the USB drive.
Sent from my OnePlus One