External microSD Card Slow in LG G3, Fast on PC - T-Mobile LG G3

I had a 128GB microSD card in my LG G3, a 128GB Samsung EVO Select microSD card. After only a year I was seeing slow read/write benchmark speeds (using A1 SD Bench) & was also seeing some lag so I replaced it with a 128GB Sandisk Extreme Pro. But the speed for the Sandisk is the same.
The app A1 SD Bench shows them both doing Read: 42MB/sec, Write: 38MB/sec. I've seen others that see speeds of 70MB/sec and higher. Both cards are formatted exFAT.
I'm concerned that maybe I've made tweaks using Trickster Mod that might have slowed the card down? Or could there be another reason? Thanks to anyone that can help.

I don't know what's causing that. I also had a problem with my LG G3 851 and the SD card. Basically the SD card died and I can't read anything from it nor reformat nor anything. It was a 128gb SanDisk, one of the faster ones, running Lineage OS 16.1. I ended up just figuring I didn't really need the SD card in my case. I'm sorry your's is running slow. All I can say is try to factory reset the phone back to stock and see if that solves the problem.

Factory reset ("saying a prayer") is too drastic a step and rarely solves anything, but I did solve the problem.
Using Desk Genius on my PC I created a single partition on the microSD card (Most people just format, you must create a partition first). Then using Windows 7 disk format I formatted the microSD card for exFAT, 128K cluster size. Now the microSD card flies!!!
It took me a full weekend of testing to come up with this. I tried using various tools to partition, and various tools to format, all with different cluster sizes. This gave me the best performance.
Tools included Disk Genius, EaseUS Partition Master, MiniTool Partition Wizard, Windows 7 built-in tools, and a lot more.
EDIT: I forgot to add, after formatting you need to go back into Disk Genius and do a 4K alignment check (it's in the Tools menu). Alignment to 4K boundaries prevents extra read/write cycles and improves performance.
If it fails 4K alignment then you need to partition and reformat all over again.

That's awesome! I'll keep that in mind if I go get another SD card some day. I didn't realize that the format could mess up the read/write speeds. I wonder if a wrong format made my SD card die. If I do get another SD card, this time I'll keep the receipt in case it stops working again. I had a PNY SD card die on me in my Surface 3 as well.

It's not just the reformat, you have to repartition as well. And I forgot to mention you need to check for 4K alignment too (I edited my OP).

Related

Memory Card Formatting

Good Evening once again,
Now that my phone is up and running again thanks to some wonderful people on here I was wondering if some could offer some advice on my memory card.
I was given a 32GB m-sd card for xmas that I REALLY want to use in my phone however having a problem formatting it. Using Gparted it will only let me create one partition. If I put my old 8GB mem card in I can delete all the parts and then recreate the two (one Fat32 and one ext4) So is there a reason why I cant do it on my 32gb card and is it fixable?
Thanks,
Max
If youre a windows user, google and download h2testw.exe to test the SD card. Just to confirm that there are no errors in the entire 32GB of space.

[Q] Formatting Fat32 64gb microSDHC card to exFAT Inquiry

I have a SanDisk 64gb card which is formatted Fat32.
I've been running it without issue for a few months.
45gb is being used.
I wanted to transfer the files to my pc, and have a few questions/comments:
- after transferring my files I want to format to exFAT
- will my files that were on my Fat32 card be able to be transferred to my exFAT card, as there are a couple of Nandroid, ROM downloads, pics, etc. that I want to transfer back.
- after transferring files to my pc, I was going to place the card back into my S4 and format card from the device. From what I've read, the device will format the card to exFAT. Would this be correct?
There are a couple of reasons I'd like to format the card:
- I want to transfer files to pc, and have some more space on the card, and figured I'd format to exFAT so as not to have file size limitations, although I've yet to dl any 4gb files.
- I'm taking a preemptive strike to avoid possible card issues which may arise in the future. I thought transferring many of the 45gb of files on the card, and re-formatting the card may assist with this, or is this not necessarily true?
If formatting the card and emptying files doesn't reduce the possibility of borking the card in the future, I want to transfer files anyway, in addition to having the card in exFAT unless there is a downside to this format.
Tia......
I recommend keeping it at Fat32. The phone won't read ExFat.
Sent from Spaceball One.
Biker1 said:
I have a SanDisk 64gb card which is formatted Fat32.
I've been running it without issue for a few months.
45gb is being used.
I wanted to transfer the files to my pc, and have a few questions/comments:
- after transferring my files I want to format to exFAT
- will my files that were on my Fat32 card be able to be transferred to my exFAT card, as there are a couple of Nandroid, ROM downloads, pics, etc. that I want to transfer back.
- after transferring files to my pc, I was going to place the card back into my S4 and format card from the device. From what I've read, the device will format the card to exFAT. Would this be correct?
There are a couple of reasons I'd like to format the card:
- I want to transfer files to pc, and have some more space on the card, and figured I'd format to exFAT so as not to have file size limitations, although I've yet to dl any 4gb files.
- I'm taking a preemptive strike to avoid possible card issues which may arise in the future. I thought transferring many of the 45gb of files on the card, and re-formatting the card may assist with this, or is this not necessarily true?
If formatting the card and emptying files doesn't reduce the possibility of borking the card in the future, I want to transfer files anyway, in addition to having the card in exFAT unless there is a downside to this format.
Tia......
Click to expand...
Click to collapse
Shouldn't be a problems with what you're wanting to do.
-Copy sd card contents to PC
-Reformat and copy content back
-Make sure the recovery you're using can read exFAT (both TWRP and Philz CWM can read exFAT)
-Also be sure the kernel support exFAT or your phone might not boot up.
-There's pros and cons to each format but for regular user like myself it's not something I really worry about
blackknightavalon said:
I recommend keeping it at Fat32. The phone won't read ExFat.
Sent from Spaceball One.
Click to expand...
Click to collapse
The phone out of the box should read exFAT. It's when using different kernels that does not support exFAT it will not read.
baseballfanz said:
Should be a problems with what you're wanting to do.
-Copy sd card contents to PC
-Reformat and copy content back
-Make sure the recovery you're using can read exFAT (both TWRP and Philz CWM can read exFAT)
-Also be sure the kernel support exFAT or your phone might not boot up.
-There's pros and cons to each format but for regular user like myself it's not something I really worry about
The phone out of the box should read exFAT. It's when using different kernels that does not support exFAT it will not read.
Click to expand...
Click to collapse
Last night, I:
- copied 45gb data from card to pc - 50 minutes
- I've read about the kernels and the format to be used
- decided to keep card @ Fat32 : "If it Ain't Broke, Don't Fix It" applies here
- I haven't deleted files yet, or formatted
I formatted the card once before using my pc and www.easeus.com
I found this also:
http://forum.xda-developers.com/showthread.php?t=1773735&page=2
But most likely will use the easeus method, which is also in that thread.
I'll take another look, but does formatting the card using the S4 format to exFAT or Fat32?
I thought it was exFAT, buy info or mis info is all over the place.
I've not used the on phone format feature yet.
To go from exFat to FAT32 I use Minitool partition
http://download.cnet.com/MiniTool-Partition-Wizard-Home-Edition/3000-2094_4-10962200.html
To go from FAT32 to exFat I just used the Windows PC formatting feature.
baseballfanz said:
I've not used the on phone format feature yet.
To go from exFat to FAT32 I use Minitool partition
http://download.cnet.com/MiniTool-Partition-Wizard-Home-Edition/3000-2094_4-10962200.html
To go from FAT32 to exFat I just used the Windows PC formatting feature.
Click to expand...
Click to collapse
I'm on Fat32 already.
Is re-formatting an exercise in futility?
I was thinking to re-format because:
- after months of making Nandroids without issue, I had trouble recently Booting after backing up to extSdCard. I'd freeze on Samsung splash after multiple backup attempts.
I backed up to internal and booted fine. I dont know if this was coincidence, but figured I'd format for good measure. Otherwise, the extSdCard is running without issue.
Not sure there even is an issue.
I actually had a successful Nandroid to extSdCard card afterwards.
Just thinking out loud.
I'll probably just empty the card of some gb, and not format.
Biker1 said:
I'm on Fat32 already.
Is re-formatting an exercise in futility?
I was thinking to re-format because:
- after months of making Nandroids without issue, I had trouble recently Booting after backing up to extSdCard. I'd freeze on Samsung splash after multiple backup attempts.
I backed up to internal and booted fine. I dont know if this was coincidence, but figured I'd format for good measure. Otherwise, the extSdCard is running without issue.
Not sure there even is an issue.
I actually had a successful Nandroid to extSdCard card afterwards.
Just thinking out loud.
I'll probably just empty the card of some gb, and not format.
Click to expand...
Click to collapse
Formatting is a breeze. I've gone from exFAT to FAT32 and vice versa without a problems. Both was achieved in minutes, only time consuming is copying contents to and from sd card.
I was also having troubles with TWRP not booting past Samsung splash screen and I was on exFAT at the time.
Like you have mentioned I only got that problems since flashing with Aroma and never before that.
I've since switch over to Philz CWM and everything is OK (except nandroid backup take ages:laugh
blackknightavalon said:
I recommend keeping it at Fat32. The phone won't read ExFat.
Sent from Spaceball One.
Click to expand...
Click to collapse
I'm sorry but this is an incorrect statement. Samsung has supported exFat on 64GB cards only on both the Galaxy S3 and S4. Their initial implementation was buggy but they did work the kinks out.
Here are the disadvantages to using FAT32 on 64GB cards:
Fat32 only supports files up to 4GB - 1 (technically 4,294,967,295 bytes) in length. A high definition video today takes up to 4GB per hour of video (even more sometimes). This limits the size of movies you can store.
The maximum size of a directory (actual number of bytes of the directory itself, not number of files) is limited to 65,5355 bytes. Considering that each directory entry takes up 32 bytes that limits the number of files in a single directory to 2047 entries if long file names are not used. With files names longer than 8 characters that number gets reduced significantly. That is a problem for apps like Titanium backup that use lots of files or if you have a lot of MP3s.
I have been using exFat on my 64GTB SDXC memory cards on both my S3 and my s4 without any problems after Samsung fixed the initial bugs.
You should not encounter any problems copying files from your FAT32 card to your PC and then copying them back to an exFat card. I have done that several times.
@ChitownWingMan
Some good info there re capacities and such.
Earlier I decided to keep the format at Fat32, and didn't re format
If it ain't broke, don't fix it, as they say.
I also understand that exFat is Kernel sensitive, so I'd be limited to wha I can flash
Owe ya a Thanks. My daily 8 limit ran out
Biker1 said:
@ChitownWingMan
Some good info there re capacities and such.
Earlier I decided to keep the format at Fat32, and didn't re format
If it ain't broke, don't fix it, as they say.
I also understand that exFat is Kernel sensitive, so I'd be limited to wha I can flash
Owe ya a Thanks. My daily 8 limit ran out
Click to expand...
Click to collapse
Your welcome. I was one of the first people to report the exFat bug in the original release of the S3 and I worked with Sandisk and Samsung to identify it as a bug.
I actually tried to run NTFS for a while but I couldn't find a decent implementation for Android and EXT2, EXT3 or EXT4 have little or no support on Windows.
ChitownWingMan said:
I'm sorry but this is an incorrect statement. Samsung has supported exFat on 64GB cards only on both the Galaxy S3 and S4. Their initial implementation was buggy but they did work the kinks out.
Here are the disadvantages to using FAT32 on 64GB cards:
Fat32 only supports files up to 4GB - 1 (technically 4,294,967,295 bytes) in length. A high definition video today takes up to 4GB per hour of video (even more sometimes). This limits the size of movies you can store.
The maximum size of a directory (actual number of bytes of the directory itself, not number of files) is limited to 65,5355 bytes. Considering that each directory entry takes up 32 bytes that limits the number of files in a single directory to 2047 entries if long file names are not used. With files names longer than 8 characters that number gets reduced significantly. That is a problem for apps like Titanium backup that use lots of files or if you have a lot of MP3s.
I have been using exFat on my 64GTB SDXC memory cards on both my S3 and my s4 without any problems after Samsung fixed the initial bugs.
You should not encounter any problems copying files from your FAT32 card to your PC and then copying them back to an exFat card. I have done that several times.
Click to expand...
Click to collapse
Ahh, this again. Since Ubuntu doesn't read exFat, you'll understand my reluctance to reformat.
blackknightavalon said:
Ahh, this again. Since Ubuntu doesn't read exFat, you'll understand my reluctance to reformat.
Click to expand...
Click to collapse
I just googled "ubuntu exfat" and came up with more than a dozen websites with instructions on how to install and use exfat on Ubuntu.
Good luck...
I have done exactly what the OP mentioned - with 32 GB SD card. I copied all files to my computer, formatted the SD card from its original FAT-32 to exFAT, using an SD-card adapter. With quick format that only takes 2 seconds. Then copied all files back to the card, stuck it in my Galaxy S4 (Build VRUEMJ7, if that's important). And it works fine - all the files are readable on the phone - music, video, .doc, .xls, .ppt. , mp3 , No problems.
TWRP recovery has support for ExFAT since v2.4.0.0.

Using 64GB microSD card with android

hey all,
i have a generic 64GB class 10 micro SD card and am trying to use it with HTC Desire HD running CM7 last nightly version. sd card came in exFAT format, which apparently only few phones support. I have reformatted it to FAT32, but learned that max size for it is 32GB. however it still mounted and appeared.
my problem is when using camera to record video, about 30 secs in i get message saying 'please insert sd card before using camera'. this dismounts the sd. thats the guaranteed way of testing. also sometimes when downloading big files from market, it also dismounts. seems any major writing to card does that. otherwise it seems to work properly. is there any way of fixing this?
so far i have tried:
using phone and computer
-reformat to FAT32
using MiniTool Partition Wizard Home Edition
- making 2 partitions FAT32, 32GB each
- making 1 big FAT32 partition, 1 small ex4
- making 1 big FAT32, 1 smaller ex4, 1 smaller swap partition, then using link2SD to build mount script.
any help would be helpful
thanks
dovy said:
hey all,
i have a generic 64GB class 10 micro SD card and am trying to use it with HTC Desire HD running CM7 last nightly version. sd card came in exFAT format, which apparently only few phones support. I have reformatted it to FAT32, but learned that max size for it is 32GB. however it still mounted and appeared.
my problem is when using camera to record video, about 30 secs in i get message saying 'please insert sd card before using camera'. this dismounts the sd. thats the guaranteed way of testing. also sometimes when downloading big files from market, it also dismounts. seems any major writing to card does that. otherwise it seems to work properly. is there any way of fixing this?
so far i have tried:
using phone and computer
-reformat to FAT32
using MiniTool Partition Wizard Home Edition
- making 2 partitions FAT32, 32GB each
- making 1 big FAT32 partition, 1 small ex4
- making 1 big FAT32, 1 smaller ex4, 1 smaller swap partition, then using link2SD to build mount script.
any help would be helpful
thanks
Click to expand...
Click to collapse
As far as i remember, Our device supports Max 32GB, above that should work as a card reader but won't give you functionality like you suppose to expect from 16 or 32GB of micro-sd card.
Advice to change MicroSD to some what 16/32 GB and even if that doesn't work then try changing rom itself.

Corrupted my 200gb Micro SD when trying to convert it to internal storage on Shield

I wanted to convert my 200gb micro sd card into internal storage for my Nvidia Shield tablet.For the specifications of the N. Shield it said 128gb was the biggest storage possible for a micro sd card, but I'd seen multiple cases of people using 200gb micro sd cards just fine on the shield.
I started the formatting process ,it got stuck at 20% and then crashed. I restarted my tablet to find that the SD card had become corrupted. I brought a micro sd adaptor and plugged it into the computer. I tried to format it from the computer to find the error message: "The volume does not contain a recognized file system". I check disk management to find that it only has 30mb storage.
I've have tried everything to restore it back to 200gb, but it still shows up as only having 30mb.
This is what I've done so far: 1) Everything diskpart related.
2) Like a dozen SD formatting programs
3) Partition tools have also failed
What do I do now? I don't want $200 down the drain.
You could try using DISKPART on Windows or the disk utility on a MAC and try to repair the volume that way, other than that I think your SD Card is made by SanDisk who has a lifetime no questions asked warranty.
I originally used the Best Buy "Pixtor" branded SanDisk card in my Portable and they replaced it with an Ultra no questions asked, (64GB U1) SD Cards die unfortunately, just call them, don't do what I did and waste 4 hours trying to fix it lol.
P.S. It sounds like the format got to 20% and found a bad sector.
Sent from my HTC One_M8 using Tapatalk
willdono said:
I wanted to convert my 200gb micro sd card into internal storage for my Nvidia Shield tablet.For the specifications of the N. Shield it said 128gb was the biggest storage possible for a micro sd card, but I'd seen multiple cases of people using 200gb micro sd cards just fine on the shield.
I started the formatting process ,it got stuck at 20% and then crashed. I restarted my tablet to find that the SD card had become corrupted. I brought a micro sd adaptor and plugged it into the computer. I tried to format it from the computer to find the error message: "The volume does not contain a recognized file system". I check disk management to find that it only has 30mb storage.
I've have tried everything to restore it back to 200gb, but it still shows up as only having 30mb.
This is what I've done so far: 1) Everything diskpart related.
2) Like a dozen SD formatting programs
3) Partition tools have also failed
What do I do now? I don't want $200 down the drain.
Click to expand...
Click to collapse
I recently "soft-bricked" a brand new SanDisk 200GB card. I was able to recover the wiped partition. I recommend you try Minitool Parition Manager. If that doesn't work, try Minitool Data Recovery. I had to end up utilizing the Data Recovery program. Now it works, and my 200GB SanDisk is good as new. If you can't seem to repair it, like @Neoistheone2000 said, your warranty will cover it Though it sucks having to go through an exchange process. Amazon is the best for situations like that.
Use any partition utility that is not built into Windows. Minitool per above, any flavor of Gparted, etc. "Real" tools will bring back any bad drive that is not a hardware failure. Ironic to many, Mac's Disk Utility is actually quite capable in this regard, as well.

Having trouble with my Micro SD card

I have an LG G3 D850 currently on Fulmics 5.2. I have never had this issue before but maybe someone here has run accross it. 2 Days ago I realized that my phone was not picking up my SD card memory. Today I decided to check it out to see what it was. First, I tried it on another phone and it picks it up just fine. All my files are there so it is not the SD card itself. I then thought maybe something got corrupted on the rom I am using but when I booted into recovery, it doesnt pick it up either. Could it be that the SD card reader on my phone is fried? What can I do to pin it down to the exact problem?
valdesr11 said:
I have an LG G3 D850 currently on Fulmics 5.2. I have never had this issue before but maybe someone here has run accross it. 2 Days ago I realized that my phone was not picking up my SD card memory. Today I decided to check it out to see what it was. First, I tried it on another phone and it picks it up just fine. All my files are there so it is not the SD card itself. I then thought maybe something got corrupted on the rom I am using but when I booted into recovery, it doesnt pick it up either. Could it be that the SD card reader on my phone is fried? What can I do to pin it down to the exact problem?
Click to expand...
Click to collapse
can still be the sd card backup your sd card and format to ntfs then to fat 32 on pc and see if that helps, also try a different sd card if you can. from personal experience a newly bought 128 gb wouldn't pick up until i formatted to a different filesystem than the fat series, or try a low level wipe on the sd card (extra careful with this one 1 pass only first 100,000 sectors)
bulletbeef said:
can still be the sd card backup your sd card and format to ntfs then to fat 32 on pc and see if that helps, also try a different sd card if you can. from personal experience a newly bought 128 gb wouldn't pick up until i formatted to a different filesystem than the fat series, or try a low level wipe on the sd card (extra careful with this one 1 pass only first 100,000 sectors)
Click to expand...
Click to collapse
But the weird thing is that I have been using this SD card for over a year now without a problem. So the first thing I thought was that the problem was with the SD card card until I put it into another phone and everything showed up fine. So the problem seems to be with my phone, either related to hardware or software.
To try your idea of the backup and format, what method do you recommend?
valdesr11 said:
But the weird thing is that I have been using this SD card for over a year now without a problem. So the first thing I thought was that the problem was with the SD card card until I put it into another phone and everything showed up fine. So the problem seems to be with my phone, either related to hardware or software.
To try your idea of the backup and format, what method do you recommend?
Click to expand...
Click to collapse
U could use low-level formatting tool here http://hddguru.com/software/HDD-LLF-Low-Level-Format-Tool/
Or regular windows format if ur on windows and gparted on linux

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