Hello!
I just had a few questions regarding Micro SD cards and I wanted to get some of your opinions on the matter.
I work in the mobile phone industry. My coworker and I were discussing (maybe a bit of arguing) the inclusion of the SD card slot inside the Galaxy S7 and whether it's a good idea. He's under the very passionate impression that Samsung made a huge mistake incuding the slot in the S7, which is very contrary to my opinion.
His reasoning is that having an SD card in your phone decreases general speed/performance and that it's an obsolete feature. I've never had an issue with SD cards in my experience. I can perhaps imagine that the class of SD card may make a slight difference. I know transfer speeds vary but I don't agree that it slows the phone down during normal processes.
Do you think the SD card or just memory cards in general will eventually become a thing of the past or do you think that expandable storage will always be a viable option at least in the forseeable future?
Related
does anyone know of any sort of equivalent to chkdsk for wp7? I've been suspecting lately that the sd card in my focus is partially corrupted (i have issues such as application installations being stuck for hours). of course thats probably just paranoia, cause i've been dealing with some other sd cards that had issues, and it took several formats with several differant programs and i'm still getting errors on them.
when you install an sd card on wp7, does it do a full format? will it detect errors? anyway i can try to fix my sd card?
(of course, i'm not even sure there is anything wrong with it)
Fairtrade128 said:
does anyone know of any sort of equivalent to chkdsk for wp7? I've been suspecting lately that the sd card in my focus is partially corrupted (i have issues such as application installations being stuck for hours). of course thats probably just paranoia, cause i've been dealing with some other sd cards that had issues, and it took several formats with several differant programs and i'm still getting errors on them.
when you install an sd card on wp7, does it do a full format? will it detect errors? anyway i can try to fix my sd card?
(of course, i'm not even sure there is anything wrong with it)
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Are you using the SD that came with the phone, or one you put in there?
If it's one you put in there, take it out and factory reset your phone.
Your SD card isn't compatible. What you're describing is exactly what happens when you try to use a SD card the phone doesn't like.
I would try a different sd card. the sandisk class2 cards seem to work best.
Ren13B said:
Your SD card isn't compatible. What you're describing is exactly what happens when you try to use a SD card the phone doesn't like.
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i'm pretty sure that its is a compatible card. because despite these issues, i've had the card in there for several months and i've never had any real problems (such as a reset)
its a pny 8gb class 4.
The brand and class rating of your card isn't really a good indicator of whether a card is compatible. And the fact that you've had it for a while with no problems isn't necessarily an indicator either, if for a good portion of that time you weren't putting enough data on it that needed to be accessed frequently.
While you will want to stay with something with a lower class rating (like class 2), that still doesn't guarantee compatibility. WP7 needs fast random read and write access. And for the most part, consumer SD cards aren't really tested or optimized for that. In fact, higher class cards are actually optimized for non-random access.
Hardware manufacturers that buy cards in bulk are able to get cards that are tested and optimized for fast random read/write times. At the moment, nobody has been offering those to consumers.
So when you buy a card right now, you're rolling the dice. The cards that haven't been tested to have fast random read/write might still make the grade. But then again... they might not.
So someone who buys a SanDisk Class 2 card might get one that works fine, while another person could get the same card and have it not work fine.
I have a 32GB micro SD in my Galaxy S2, Acer A500 and my cameras. I just noticed that when transferring large files, transfers that in turn take a long time of read / writes the card gets real hot. I can't say for sure, but I feel that when the card gets hot, it then slows down.
Has anyone else noticed this? Most of my cards are Sandisk. I don't know if my 16GB cards do the same, I can test it if you want.
yes the micro sd card on my phone runs exceptionally hot sometimes. It has a steel enclosure so maybe that is conducting the heat from the battery or it could be due to chip in the sd card running many read write cycles. Have you made a swap partition by any chance or increased the cache to 2048. These are known to increase performance but at the cost of sd card life.
In my experience though, the heat is really nothing to worry about.
You'll probably find that the card gets hotter when writing, as the power required to "write" a cell is much greater than the power required to read it back. It shouldn't affect performance, but may affect longevity of the card.
That being said, it's solid state, so the heat shouldn't be much of an issue (except if the plastic casing is melting...).
jeromejones said:
Have you made a swap partition by any chance or increased the cache to 2048. These are known to increase performance but at the cost of sd card life.
In my experience though, the heat is really nothing to worry about.
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Nope, no swap partition. Like I said, I only noticed it:
1- when its in the USB card reader on my laptop (I can actually touch it that way when its in use) &
2- Its only in that card reader if and when I plan on doing LARGE file transfers, 5GB+. That obviously puts more strain on the internals.
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JDMpire said:
Nope, no swap partition. Like I said, I only noticed it:
1- when its in the USB card reader on my laptop (I can actually touch it that way when its in use) &
2- Its only in that card reader if and when I plan on doing LARGE file transfers, 5GB+. That obviously puts more strain on the internals.
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Nope, it can operate normally without issues...
"SanDisk microSD and microSDHC memory cards add storage space for photos and apps ... They can operate in temperatures ranging from -13 to 185 degrees ..."
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source: http://www.sandisk.com/products/memory-cards/microsd/class4/
But I have class 10 64 GB and it work as speedy as it should even if its hot, and the plastic coating somehow getting weird Gray colour.
hope I am not late. hehe.
I know the thread is old
I know this thread is old but so future xda developers might happen upon these answers. I had same issuses due to bent pins on my mainboard. Lost 2 32gb cards thinking it was everything under the sun but that.
I have 128gb Samsung 2017 model micro sd card and it runs super hot eating all of my phone battery. I looked up some forums and people say that it might be defect card. I hope that's not true because i payed a lot of money for this tiny thing.
I have a new TF700T with the Keyboard/Dock, and am wanting to pretty much max out its storage capacity in preparation for an upcoming trip (photography).
I realize that the Tablet itself requires MicroSD. I'm actually looking at this one:
Sandisk 64gb MicroSDXC Class 10
The Dock will obviously take a straight SD card, or a MicroSD card using the SD adapter. Is one of these ways any better as far as performance and reliability? I want to maximize read/write speeds.
I've also read enough threads here and elsewhere to see that this device is finicky with regard to which cards it'll work with, which formatting will be accepted and seen, etc. Any thoughts/experience in terms of which 64gb SD and/or MicroSD work best would be appreciated. And I understand that the higher the Class, theoretically the faster read/write speeds, but in an imperfect world, this isn't always the case, especially with this somewhat quirky device.
DLCPhoto said:
I have a new TF700T with the Keyboard/Dock, and am wanting to pretty much max out its storage capacity in preparation for an upcoming trip (photography).
I realize that the Tablet itself requires MicroSD. I'm actually looking at this one:
Sandisk 64gb MicroSDXC Class 10
The Dock will obviously take a straight SD card, or a MicroSD card using the SD adapter. Is one of these ways any better as far as performance and reliability? I want to maximize read/write speeds.
I've also read enough threads here and elsewhere to see that this device is finicky with regard to which cards it'll work with, which formatting will be accepted and seen, etc. Any thoughts/experience in terms of which 64gb SD and/or MicroSD work best would be appreciated. And I understand that the higher the Class, theoretically the faster read/write speeds, but in an imperfect world, this isn't always the case, especially with this somewhat quirky device.
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I have one of those, formatted with exFAT. In the tablet it seems fine, and I can put video files on it and stream them off with no problem.
Not tried it in the dock.
If I unmount it clean from the tablet it is usually fine in my Windows 7 laptop; but occasionally it gets left in a dirty state and Windows will mount it read-only. I don't know if that's common with other cards.
However, in another thread I started a while ago I think we've found that the card can't be used in the tablet for recovery purposes. That may or may not matter to you.
Thanks for the reply. I went ahead and order the MicroSDXC card above, along with the full SD version of the same Class 10 card. I heard from another TF700T user for whom the MicroSDXC worked fine, so hopefully I'll be okay.
And thanks for the tip, but no, I won't need that card for recovery purposes.
Best,
So here's a point of contention, I've been told by several people that if your phone can support "up to 64GB" Micro SD Cards for example, you should always use the next size down, i.e. 32GB rather than the maximum it can take, because manufacturers "over-sell" the device capabilities and using the highest advertised capacity can cause problems down the line.
In anyone's experience, have you found this to be true?
I've worked with mobile tech & computers for years and have never seen any practical evidence to suggest this is fact rather than fiction, but I want to get the internet's experiences as well to be sure.
i don't think so
i think it's ok
I have never had problems by using the maximum at such an indication with my phones/tabs.
When you are using an good and fast SD card, you shouldn't have problems.
Yeah no problem using max supported. If there was a problem then it wouldn't be supported...
I've never heard of anyone having problems with using the maximum size SD card compatible with your device. I don't know the differences between the classes or types of SD cards there are, if there is a difference or if it is the deciding factor in what size/type SD card you use. Maybe someone will enlighten us.. Ex: SD/SDHC/SDXC and class 4/10.
A quick Google search shows:
"SD, SDHC and SDXC are all variants of the SD (Secure Digital) format, that have been released in that order by the SD Association.
As requirements for higher capacities came in, SD cards have grown in capacity too (SDHC is SD High Capacity, while SDXC is SD Xtended Capacity). SDHC cards typically come in capacities between 4GB to 32GB. SDXC cards come in sizes of 32GB of higher, with a theoretical maximum of 2TB.
Backwards compatibility is built in, so if a camera has SDHC support , it will support standard SD cards too. If a camera or device has SDXC support, it will support SD and SDHC. These cards have speed ratings too; Class 2, 4, 6, 10 and so on, with Class 10 having the fastest read-write performance. "
Details here - en.wikipedia.org/wiki/Secure_Digital
Hello all,
Any help would be very very much appreciated...
I am brand new to the Android world (2 months) and have been following this forum since. I have figured out how to flash my verizon model s7 to the universal, have figured out the best case and best glass screen protector.... I have even read extensively on SD cards and their speeds and the differences between adoptable and rooting....
Here's my question: I am an excessive app user, and yes I know the solution to this is to delete the apps I don't use....
But, I would really like to just store apps on my SD card and run them off of the card
I originally bought a SanDisk Ultra 200GB and a SD Extreme 128GB..... but upon further investigation I'm kind of feeling overwhelmed on what to do and which SD to buy.
From what I can find out there are two options for this:
Adoptable:
But, it's kind of buggy.
I don't want my entire phone, pictures, etc migrated over to the SD, just the ability to fully install apps
There are limitations to which apps can be migrated to the SD card
Best to have a faster SD card versus size, but there is still a significant bottleneck, UHSII doesn't work on this phone... so the SD Extreme or faster is best.
Root (Link2SD etc):
The Root for this phone is very buggy and I have seen quite a few go back to stock. And I don't want to trip KNOX quite yet... still under warranty.
Can move any app to my SD!!
SD doesn't need to be fast as long as I don't mind my apps loading slowly (or transfer the used ones to internal...)
Is there in-game lag, after loading, running from a slower SD such as the SanDisk Ultra?
I am full of competing ideas and the wealth of information on this forum and elsewhere is overwhelming me. I have spend over 20 hours in the last couple weeks researching this issue alone....
Please, any and all guidance and help would be very very appreciated. Thank you!
What did you choose at the end?
Hello! I chose the SD extreme 128. Upon further investigation it seems you cant truly install and run apps, app data and all from the SD card with adoptable, the only way to do that is with root access. So I went for the faster sd which put up really gread numbers. There is an SD card discussion I also posted in with my results and they beat the other same tier cards and rival some of the more expensive ones. I use the card mosty for 3D movies for my gear vr and have put a lot of apps on it (not tbe data of course which takes up the most space). I am awaitkng the day my Samsung warranty expires to root because 32 GB kinda sucks.
However, it would be safer to go with the faster card for adoptable anyway.
Also, I can record HD video directly to it while the 200GB cannot do that.