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[Q] USB Hosting

I bought a small micro - usb female adapter. When I plug it in, no matter what device i use it seems as those the xoom is not sending any power through it.
Ive tried
Camera
Charge Phone
usb mouse
usb wireless mouse
nothing is getting power.
Is there something i need to enable or do? Or has anyone esle has this issue? I am on 3.1....

You can not use a simple micro usb adapter cable, it has to be an OTG USB Host cable like the official Motorola camera connection kit that is now available. This is a bit expensive but readily available at your local Best Buy.
Take a look at some of the many posts on OTG cables and you can find info on cheaper cables that have been verified to work or on how to make your own.

you need a USB Host cable. Not just a regular sync cable. You can google for one or search the threads here where others have linked to confirmed working cables.

dang, thanks guys

I ordered one from ebay! hope it works

I have a question that applies here, I am on stock 3.1 Xoom WiFi/3G and just got my OTG cable, plug it in usb drive blinks like its working but where is it located on the Xoom? I've been looking around for it with Astro and File Explorer and I'm unable to find it... could someone tell me the path?

Techsniffer said:
I have a question that applies here, I am on stock 3.1 Xoom WiFi/3G and just got my OTG cable, plug it in usb drive blinks like its working but where is it located on the Xoom? I've been looking around for it with Astro and File Explorer and I'm unable to find it... could someone tell me the path?
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i believe stock 3.1 only supports MTP, hence no USB mass storage.
http://en.wikipedia.org/wiki/Media_Transfer_Protocol

I've heard many conflicting stories, I would like some sort of confirmation rather then speculation about what will/will not work with the Moto Xoom (Stock 3.1) Wifi/3g and an OTG cable because I've seen posts saying yes and no to USB, portable HD's etc etc. Can anyone even provide me with some informative links? Everything I've searched for has been less than informative.

So, stock 3.1 Xoom is an MTP device, that is true.
However, with latest series of Tiamat custom kernels by Bigrushdog (see Android Development section) the usbOTG has been enabled. If you have already rooted and installed the proper bootloader/Tiamat kernel, then in File Expert you will find the usbOTG folder on the root directory, same level as internal sdcard and data folders. If you go up a step in sdcard, you should see your external sdcard. Is this clear?

I have rooted, using the Tiamat 1.6, I have access to the sdcard now but I am still unable to access my usb drive (thumb drive). I have an OTG usb cable and when I go into the /OTGusb its empty. The drive blinks as if its initializing but then nothing.

On a side note, I have looked through both OTGusb folders, restarted the Xoom with the OTG and usb plugged in as suggested in another post and nothing I've tried has worked in locating the usb drive.

Techsniffer said:
I have rooted, using the Tiamat 1.6, I have access to the sdcard now but I am still unable to access my usb drive (thumb drive). I have an OTG usb cable and when I go into the /OTGusb its empty. The drive blinks as if its initializing but then nothing.
Click to expand...
Click to collapse
I've found that there are two factors which may be in play here...
1. When I connect a flash drive it takes a bit of time for the directory structure to parse... It does show up in the OTGusb directory.
2. I've found that anything larger than 8GB (I've seen it stated in the forums as well) does not work (of if it does it takes forever and a day to become available)
Hope it helps...

I have same problem here. whenever I try to connect the USB with Motorola connector, it doesn't appear anything in otgusb

I'm not sure I am going to get what I want at this time with the OTG cable. My goal is to be able to use the OTG cable to connect a USB thumb drive to so I can carry additional movies, documents, etc without completely consuming the main Xoom storage.
Can the OTGusb cable support this? Do I need to wait for yet another update?
TIA

How do I use my tablet as a mass storage device?

I want to move a 10GB file to my computer from another one, but I don't have a pen drive or external HD around... I used to install the USB drivers on my computer, and plugged my tablet into my computer's USB port, it worked like a charm but since I upgraded to JB the drivers are useless now, what do I do?
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

You need to buy a USB pen drive or an external HD, or a network cable. The tablet cannot be mounted as USB mass storage device because that mode would need to give full control over the internal storage to the computer, i.e. Android could not run at the same time.

It still works fine I copy large files all the time. Just make sure you have the latest SDK from Google installed and you should get the latest USB drivers then you can use it like a pen drive again.

sbdags said:
It still works fine I copy large files all the time. Just make sure you have the latest SDK from Google installed and you should get the latest USB drivers then you can use it like a pen drive again.
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As USB mass storage? I don't think so - which filesystem should be unmounted here?. Otherwise please explain in detail how. And if you mean only as MTP device, how do you transfer files > 2 GB?

Ah right yes not as a mass storage device. I never tried anything over about a gig so never thought about that.

Since JB, only MTP(Media Device) and PTP (Camera) protocols are supported. The MTP protocol is achingly slow, not just on the TF700. My SGS3 (supposedly 'faster than the tf700') is equally slow in terms of USB transfer.
I agree that it used to work as a regular Mass Storage Device before JellyBean. Mine always showed up as F:\Asus TF700T. Updated to JB and to my great annoyance, only MTP. (PTP is pointless.)
ICS with Regular took 30 seconds to copy 600MB. JB's MTP requires 5 minutes! On both of my devices.
As for it not showing up, it's not in the list of drives. It should show up below everything else, without a drive letter(!). For me it's below Control Panel and above Shared Documents. (WinXP)
Did you, by any chance, kill the wufdhost.exe process in taskmanager's processes tab? You see, I did. And not a single MTP device would be recognised afterwards. It should A, running in Taskmanager, B, be in C:\WINDOWS\system32 and C, as 'Windows Driver Foundation - User-mode Driver Framework' in services.exe.

USB OTG Problem [Drive formatting/empty]

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

Will not transfer files properly to PC/USB Drive

I am having an issue transferring files from my phone to a USB flash drive that is connected to the computer.
It works fine for anywhere between 10-100 songs. Usually around 40 or 50 songs. All of a sudden it will stop and I get the awesome error "a device attached to the system is not functioning". At this point the only thing I can do is restart my phone, and then the process keeps repeating.
I have tried this with USB debugging on and off. I am doing this on my work computer that has Windows 7.
Any ideas on what I can do here? Thanks everyone!!
EDIT: The USB flash drive is a brand new 64gb Sandisk if that matters - doubt it since it seems like the issue is on the phone end

Galaxy Note10+ OTG support issue after updated to Android 10 with One UI 2

After updated my Note10+ (Exynos) to Android 10 and One UI 2.0, I found one serious problem:
Problem: When I inserted Samsung USB-C to USB-A adapter to the phone, then attach a USB drive (which work fine on the same phone when running Android 9, and the device was checked to make sure its functioning), Note10+ fail to auto-mount the USB drive. There are no response, and Samsung My Files app do not recognize the USB drive
Workaround: To make it work, I have to install Sandisk Memory Zone app from Google Play. after that, when I inserted the USB drive, Sandisk app detect the drive and I can transfer file using Sandisk app as usual. However, Samsung stock My Files app still do not show the USB drive as it should be
Another work around is to mount the USB drive with Paragon NTFS eFAT/NTFS for Android, then browse or transfer file with Total COmmander file manager. Still, Samsung My Files app do not show the mounted USB drive at all
I think there must be a bug with Samsung firmware that need to be fixed. I have reported this to Samsung Support staff over the live chat
Any friend experience the same problem? Or it is just me?