Develop Bugs

Outgrowing SD card, need help ...

I'm outgrowing my 8GB class 2 micro SD ... growing to 16GB.
How do I migrate to a new card?
How do I preserve everything on present SD? app, pics, music etc.
Is it a FAT32 format or ext3 formatted card?
What folders & folder structures are extraneous (ie. left over from previously removed apps) which DO NOT need to move to the new SD?
All ideas, suggestions & previous experiences & best practices welcomed!
Thanks!
Dan

Just copy all the files over to your computer using windows explorer, swap the cards in your phone, then copy it all back.
Sent from my T-Mobile G2 running Cyanogenmod.

Sure... do that if you don't mind wondoze corrupting everything on both cards and loading them with virii.
I suggest using the "dd" command under linux. Much stronger.

dhkr123 said:
Sure... do that if you don't mind wondoze corrupting everything on both cards and loading them with virii.
I suggest using the "dd" command under linux. Much stronger.
Click to expand...
Click to collapse
Never have had this happen to me when switching SD cards and moving data in between them.
HTC Vision S-OFF CM6.1 Stable Oc'd to 1.5ghz on Pershoots Kernel

dhkr123 said:
Sure... do that if you don't mind wondoze corrupting everything on both cards and loading them with virii.
I suggest using the "dd" command under linux. Much stronger.
Click to expand...
Click to collapse
I doubt that someone who doesn't even know how to duplicate an SD card has Linux installed.
Just use windows, it works fine.
Sent from my T-Mobile G2 running Cyanogenmod.

"corrupting everything on both cards and loading them with virii"
LOLLL
Ya ok, he'll get right on that. Even hypothetically if his machine was full of "virii", they wouldn't have any affect on android. It's just as risky as mounting your sdcard through your usb. (which most users do on a daily basis) Honestly dhkr123, that would be like the most unnecessary route of action for such a simple task.

ibemad1 said:
I doubt that someone who doesn't even know how to duplicate an SD card has Linux installed.
Just use windows, it works fine.
Sent from my T-Mobile G2 running Cyanogenmod.
Click to expand...
Click to collapse
Agreed, just be sure to format your 16 gig card, while it's in the phone, through settings. Then mount it and copy over the contents of the 8 gig.
Sent from my T-Mobile G2 using XDA App

My experience root and flash : Leedroid 2.3c amazing

Finally after lots of deliberating I rooted my desire and flashed with Leedroid 2.3c.
It is such an easy process and took less than 2 hours including restoring backup apps.
A2sd+ works like a dream and setcpu has appeared to increase my battery life by about 60%.
Best thing is I am no longer facing that stupid low space notification and I have retained use of HTC sense.
I urge all HTC Desire owners who constantly battle with that low space notification to root and flash.
Sent from my HTC Desire using Tapatalk

Exactly what i was thinking of doing! how do you partition your SD card?

Yes done this not so long ago, its what the phone should of been like out the box. loving A2SD+ works great, setcpu only just installed it today. am also using LeeDroid superb rom.

I found the easy way was through windows insert your sd card into your PC and download and install EASEUS Partition Master Home Edition, you can get this from download.com. hope this helps
PulpzillA said:
Exactly what i was thinking of doing! how do you partition your SD card?
Click to expand...
Click to collapse

I've been thinking about doing this myself for quite some time now. After your post here, I might finally give it a go in a few hours... after midnight is best for such things
After doing this, do you still lose access to all apps on SD while connected via USB to your laptop? Or is this issue gone due to SD card partitioning? I would like to force-move quite a lot of stuff onto my class 10 Kingston

You will lose everythink sadly, make sure befor you format you backup your photos,vids,contacts stuff like that. apps you have paid for from market can be downloaded again without paying.
/rant/ said:
I've been thinking about doing this myself for quite some time now. After your post here, I might finally give it a go in a few hours... after midnight is best for such things
After doing this, do you still lose access to all apps on SD while connected via USB to your laptop? Or is this issue gone due to SD card partitioning? I would like to force-move quite a lot of stuff onto my class 10 Kingston
Click to expand...
Click to collapse

Or your other option is to root your phone first, and then used a backup manager.

Thanks for the help
ext3 best? and also can you set any size?
will the ROM automatically use the ext3 partition when it runs out of space?

I use ext3 am not sure witch is better tho I just went with that. the rom use the partition all the time, like befor I rooted and installed a custom rom my memory was always low, now I have over 100 apps and still have 63MB and 800MB ext3.
I wouldn't go over 1.5GB well thats what Ive been told and read, I just done mine to 1GB 1024mb=1GB
PulpzillA said:
Thanks for the help
ext3 best? and also can you set any size?
will the ROM automatically use the ext3 partition when it runs out of space?
Click to expand...
Click to collapse

shankly1985 said:
I found the easy way was through windows insert your sd card into your PC and download and install EASEUS Partition Master Home Edition, you can get this from download.com. hope this helps
Click to expand...
Click to collapse
same here!

So, I am going to do the same right now. This is me posting from my Ubuntu paraboot, HTC Desire 2.29.405.5 Stock and a cup of coffee. Wish me luck

/rant/ said:
I've been thinking about doing this myself for quite some time now. After your post here, I might finally give it a go in a few hours... after midnight is best for such things
After doing this, do you still lose access to all apps on SD while connected via USB to your laptop? Or is this issue gone due to SD card partitioning? I would like to force-move quite a lot of stuff onto my class 10 Kingston
Click to expand...
Click to collapse
Well done guys for thinking about it. You will surely not regret it. Root and then back up using titanium. Copy backup to pc and then clean flash a rom. Copy back from pc and restore what you need.
Sent from my HTC Desire using Tapatalk

shankly1985 said:
I found the easy way was through windows insert your sd card into your PC and download and install EASEUS Partition Master Home Edition, you can get this from download.com. hope this helps
Click to expand...
Click to collapse
It won't work on Windows Professional machines, which is a bummer as it's a great tool.
I use an Ubuntu Live USB boot and use Gparted. Also lets you easily mess with Windows partitions in ways that make Microsoft feel violated
Also gives you a nice little portable OS and since they made an installer to easily create a persistent state Live USB, it's just a handy tool to carry with you if you fiddle with PCs alot.

Well, it seems like I have to drop this issue for now; I've been trying for more than two hours and I did not succeed using unrevoked 3.3 on Ubuntu 10.10 64-bit, Ubuntu 10.4 and Windows 7 x64. I followed all steps, but it only killed some apps on my SD, nothing more.
32.49.00.32U_5.11.05.27 (Baseband), 2.6.32.15-gf5a401c [email protected] #1 (Kernel), 2.29.405.5 CL293415 release-keys (Build), 2.29.405.5 (Software), HBOOT 0.93.
One time unrevoked wrote: "Is your firmware too new?"
What am I missing? Can this be done?

I had all sorts of troubled using unrevoked until I finally tried it using a goldcard and it went through first time.
Sent from my HTC Desire using XDA App

@rant
Where exactly are you getting stuck. I used win 7 x64. I also was running the you tube video of how to root with unrevoked simultaneously.
Sent from my HTC Desire using Tapatalk

I was just able to root it using Ubuntu Netbook Edition and am currently repartitioning my SD card for ext-support. Here we go!
How long does this usually take? It won't stop and my phone won't charge... well I just aborted this and try with gparted.

/rant/ said:
After doing this, do you still lose access to all apps on SD while connected via USB to your laptop? Or is this issue gone due tr SD card partitioning? I would like to force-move quite a lot of stuff onto my class 10 Kingston
Click to expand...
Click to collapse
No. The main difference between a2sd+ script and froyo's apps2sd is that froyo uses fat32 partition to store apps which have been coded accordingly. The script moves all the apps to the EXT partition which does not need to be mounted nor unmounted for it to be accessed by the PC, therefore it won't interfere with your apps in any way any longer.

Reporting in; I just flashed a ROM onto my HTC Desire for the very first time. Currently running device setup connecting to Wi-Fi. Thank you for convincing me!

/rant/ said:
Reporting in; I just flashed a ROM onto my HTC Desire for the very first time. Currently running device setup connecting to Wi-Fi. Thank you for convincing me!
Click to expand...
Click to collapse
Well done. Which rom did you flash with?
Sent from my HTC Desire using Tapatalk

[Q] How Do I Remove An Ext3 Partition From My Sd Card?

I was using my 4gb sd card for apps to sd for my previously-rooted android phone, and had about a 500mb of it partitioned to ext3. I have since unrooted my android phone and put it back to stock, but in doing so, I lost the recovery console that would allow me to unpartition my sd card. Is there a safe program that will recognize the ext3 partition and remove it?

Gparted. You can use a live cd or a VM.

Hi there. I downloaded a free program call minitool partition wizard. Do a google search for it (I can't post links)
It has worked well for me with my SD card partitioning.
Make sure you back up the contents of your SD card before removing the ext 3 partition as it will delete all the contents on it.

could you please elaborate a little as i am a noob. like whats gparted? whats a vm? whats the process of doing what i asked? thanks for the help.

I don't know if Windows recognises it at all but worth a try really. Gparted is a live cd tool that allows you make partitons on a storage device. I think that VM refers to a Virtual Machine, using something like VMWare or VirtualBox.

guys please help. i used these softwares but none of these is showing my ext3 partition in the program window. just a 3.22gb of one partition on phone. the 512mb of ext3 partion is still missing and i dont know where to find it.

Well, since you really don't need the ext3 partition anymore, you could format the whole SD card from windows (do a back-up of the content on the hdd before, though). Then in Windows (I'm guessing you're using windows ), with the phone connected in mass storage mode, right click on My Computer / Manage / click on Disk Management and you should see in the list of the drives your SD card (pay attention to the size). Right click on the 512 MB partition - Delete volume... After that you should create a new partiotion, format it as FAT32... Or you could delete all the partitions of the card and create a new volume.

Icysoul said:
Well, since you really don't need the ext3 partition anymore, you could format the whole SD card from windows (do a back-up of the content on the hdd before, though). Then in Windows (I'm guessing you're using windows ), with the phone connected in mass storage mode, right click on My Computer / Manage / click on Disk Management and you should see in the list of the drives your SD card (pay attention to the size). Right click on the 512 MB partition - Delete volume... After that you should create a new partiotion, format it as FAT32... Or you could delete all the partitions of the card and create a new volume.
Click to expand...
Click to collapse
i did that. in disk management i only see a 3.22gb partition. (i have a 4gb card, so i 512mb is still missing). i cannot find the 512mb ext3 partition anywhere. please can someone help me to find a software or any other method which will be able to detect the ext3 partition as well ?

The partition may be corrupted. You can still try to use Gparted live cd - google for gparted-live-0.7.1-5.zip . It can also be installed on USB flash, check their site for instructions. Restart your PC and boot from the CD or USB flash then check your sd card. If it still doesn't recognize the 512 partition, you might be out of luck.

Icysoul said:
The partition may be corrupted. You can still try to use Gparted live cd - google for gparted-live-0.7.1-5.zip . It can also be installed on USB flash, check their site for instructions. Restart your PC and boot from the CD or USB flash then check your sd card. If it still doesn't recognize the 512 partition, you might be out of luck.
Click to expand...
Click to collapse
how could the partition be corrupted because i was using the ext3 partition to install apps when i had root. it was only recently that i have to sell out my htc desire and i unrooted my htc desire. unroot procedure was done successfully but the card is only showing 3.22gb, i-e, 512mb is missing. this may become an issue if the buyer does not want to pay for a 4gb card with only 3.22gb of storage. it should be around 3.5-3.6gb

A partition may become corrupted if you remove the battery from the phone while the system is still running (i.e. writing data on the partition), it is not unheard of. Do try the gparted solution mentioned before, though.

Icysoul said:
A partition may become corrupted if you remove the battery from the phone while the system is still running (i.e. writing data on the partition), it is not unheard of. Do try the gparted solution mentioned before, though.
Click to expand...
Click to collapse
yes buddy i have tried the gparted solution you suggested before. even that is showing only 3.22gb of my sdcard and no mention of the 512mb ext3 partition. i dont know whether i am doing something wrong or what.... ???
Anyway, is there anyway i could recover that corrupt partition? Like can i ROOT my htc desire again and then try to format the ext3 partition from the recovery? i read somewhere there is a way to do that in recovery by giving some commands. and once i have recovered the ext3 partition space then i can UNROOT my htc desire again. DO YOU THINK IF I DO THIS ITS GONNA BE OF ANY USE? Please help me.

This might work since it worked for me. 4GB mysteriously disappeared from my 16GB card and neither Windows or gparted picked it up. The only way I was able to get it back was putting it in my phone and the Android picked it up. I did have to format my whole SD card but nontheless, I got all my space back. Hope this helps and if you have tried this then I can only guess that your SD card is buggered.

GoogleJelly said:
This might work since it worked for me. 4GB mysteriously disappeared from my 16GB card and neither Windows or gparted picked it up. The only way I was able to get it back was putting it in my phone and the Android picked it up. I did have to format my whole SD card but nontheless, I got all my space back. Hope this helps and if you have tried this then I can only guess that your SD card is buggered.
Click to expand...
Click to collapse
um actually, my sdcard IS in the phone this whole time as i dont have any card reader. i am connecting my phone with my pc in hard drive mode.
from within the phone, i have tried to format the sd card many times but the space does not go beyond 3.22gb..

Something seems to have messed the partition up. Have a look around on the web
Sent from my HTC Desire using XDA App

ok tell me if i root my cellphone again, will it help?
because there is a way to delete the ext3 partition from the recovery.

finally recovered my ext3 partition.
this is what i did.
1) rooted my phone.
2) enter into clockworkmod recovery
3) mount sd-ext (i guess it wasnt mounted that's why no app was recognizing it)
4) now windows was able to recognize the ext3 partition.
5) problem solved.

jamy_hallian said:
finally recovered my ext3 partition.
this is what i did.
1) rooted my phone.
2) enter into clockworkmod recovery
3) mount sd-ext (i guess it wasnt mounted that's why no app was recognizing it)
4) now windows was able to recognize the ext3 partition.
5) problem solved.
Click to expand...
Click to collapse
Oh man, I had EXACTLY the same problem and was driving me nuts. I searched high and low everywhere and couldn't find the answer. Thank you!

shaboobla said:
Hi there. I downloaded a free program call minitool partition wizard. Do a google search for it (I can't post links)
It has worked well for me with my SD card partitioning.
Make sure you back up the contents of your SD card before removing the ext 3 partition as it will delete all the contents on it.
Click to expand...
Click to collapse
this worked.. thanks a lot
i had the same issue as the OP

Use a card reader and MiniTool Partition Wizard.
Delete all partitions on the SD card and create a new one that fills the entire SD

[Q] Running out of Space, Symlinks and Installing Apps to SDcard

Due to size limitations (GPads only coming in 16gb varieties) I am beginning to run low on space on my Gpad (v500 running cm11). However I have a 64gb microSD card and I would like to use this as much as I can to conserve space on the internal memory.
There are a few ways to solve this but I not fully know how to do this.
Firstly, is it possible install apps to microSD card? If so, how? I know some devices support this and some do not. My phone for example does not but I have heard that some people have had success with this.
Next, there are some rather large folders on my internal storage that I would like move to my sdcard however the apps that use those folder can only read them where they are currently located (cmupdates, ebooks, etc).
I read about symlinks and managed to make a few but the only place I was able to make a symlink was to /data/media/0. But the changes to that do not show up the apps which I believe read either /sdcard or /storage/emulated/0. And for my SDcard I can get to it either in /mnt/media/sdcard1 or through /storage/sdcard1.
I tried and succeeded in making a link between /mnt/media/sdcard1/eBooks and /data/media/0/eBooks however the link does not show up in /sdcard or /storage/emulated/0 and it does not show up in the apps, leading me to believe that is where the apps read the sdcard from.
If anyone can answer the above two questions or give any other suggestions for maximizing available space on my internal card please let me know.
Thank you!

I think most of your issues could be resolved with Link2SD (under 10 posts, can't post a link to Google Play).

You can also use an app called Foldermount. It's only $.99 ( if I recall correctly) for the unlocked version. This allows you to move any folder to SD card. I like it as it guides you thru the way and will move the data for you as well. Latest version has been updated to allow apps from play store to install properly. Well worth the $1 price.

mzfckr993 said:
I think most of your issues could be resolved with Link2SD (under 10 posts, can't post a link to Google Play).
Click to expand...
Click to collapse
cbb77 said:
You can also use an app called Foldermount. It's only $.99 ( if I recall correctly) for the unlocked version. This allows you to move any folder to SD card. I like it as it guides you thru the way and will move the data for you as well. Latest version has been updated to allow apps from play store to install properly. Well worth the $1 price.
Click to expand...
Click to collapse
Thanks guys! Looks like using these two combined I can get exactly what I wanted. I'll use link2SD to put apps on the SD card and Foldermount to move the other folders I want moved.
Thanks again!

Can you let me know if this works for you? I can't get mine to read or write my SD card at all! I can't even move a picture from my Box cloud account to the SD card. Are you experiencing this? Or did I get a bad unit?

1barlog17 said:
Can you let me know if this works for you? I can't get mine to read or write my SD card at all! I can't even move a picture from my Box cloud account to the SD card. Are you experiencing this? Or did I get a bad unit?
Click to expand...
Click to collapse
These solutions did work for me, I am still tweaking to get it the way I like it especially since every time I update my Rom Link2SD has to generate new scripts. I can ready and write to the SD card just fine and I could before I started using this as well. I am not sure why you aren't able to write to your sd card. Could it be a bad SD card? Try plugging it into your computer.

I've tried 2 different SD cards both of which I can move files to and from on my computer. So I know it's not the card. I'm thinking maybe I should exchange it out for another day one...

1barlog17 said:
I've tried 2 different SD cards both of which I can move files to and from on my computer. So I know it's not the card. I'm thinking maybe I should exchange it out for another day one...
Click to expand...
Click to collapse
Probably... That sounds like a device issue not card.

How are the cards formatted?
The ROM you are using may not support the format.
1barlog17 said:
I've tried 2 different SD cards both of which I can move files to and from on my computer. So I know it's not the card. I'm thinking maybe I should exchange it out for another day one...
Click to expand...
Click to collapse

C0BRA01 said:
How are the cards formatted?
The ROM you are using may not support the format.
Click to expand...
Click to collapse
I'm not sure I just put the card in my computer and clicked format SD card. I'm not rooted or running any special ROM, it's completely stock out've the box.

Well, if you did it from your PC, it may be formatted NTFS, and you need them formatted FAT 32. Get it here; http://www.partitionwizard.com/free-partition-manager.html Not only allows formatting almost any format xFAT, Fat32, NTFS, etc.. and you can partition them also which is not supported by Windows, but IS supported by most Android ROMs. I doubt there is anything wrong with your device.
1barlog17 said:
I'm not sure I just put the card in my computer and clicked format SD card. I'm not rooted or running any special ROM, it's completely stock out've the box.
Click to expand...
Click to collapse

C0BRA01 said:
Well, if you did it from your PC, it may be formatted NTFS, and you need them formatted FAT 32. Get it here; http://www.partitionwizard.com/free-partition-manager.html Not only allows formatting almost any format xFAT, Fat32, NTFS, etc.. and you can partition them also which is not supported by Windows, but IS supported by most Android ROMs. I doubt there is anything wrong with your device.
Click to expand...
Click to collapse
Thanks for the tip, this makes me feel a little better about my purchase, I'll give it a try. I'm also thinking of buying a 64gb San Disk card and hopefully it will just work with a brand new one.

These solutions did work for me, I am still tweaking to get it the way I like it especially since every time I update my Rom Link2SD has to generate new scripts. I can ready and write to the SD card just fine and I could before I started using this as well. I am not sure why you aren't able to write to your sd card. Could it be a bad SD card? Try plugging it into your computer.

Lucien2 said:
These solutions did work for me, I am still tweaking to get it the way I like it especially since every time I update my Rom Link2SD has to generate new scripts. I can ready and write to the SD card just fine and I could before I started using this as well. I am not sure why you aren't able to write to your sd card. Could it be a bad SD card? Try plugging it into your computer.
Click to expand...
Click to collapse
I have been trying to fix the issue with Rom updates and link2sd. You have to provide the Rom (in my case cyanogenmod) a backup script so it can back up the files. I am planning on figuring it out at some point but if you get it before I do would you mind posting your script? Thanks!
Sent from my VS870 4G using XDA Premium HD app

colwellkr said:
I have been trying to fix the issue with Rom updates and link2sd. You have to provide the Rom (in my case cyanogenmod) a backup script so it can back up the files. I am planning on figuring it out at some point but if you get it before I do would you mind posting your script? Thanks!
Sent from my VS870 4G using XDA Premium HD app
Click to expand...
Click to collapse
So a follow up with this, I was able to get a script working. I don't know if this feature is unique to cyanogenmod or not but any script in /system/addon.d will execute itself during a rom install and be restored automatically if it was wiped. So using 50-cm.sh as an example I made a script called 11-link2sd.sh to perform the backup of the mount script for link2sd which is located in /system/etc/init.d/11link2sd.
I then had insert this script and my mount script into a cyanogenmod update and flash it in. But after that I tried flashing an update of cm11 to test it and it worked! Attached is my script which should also work for anyone who is able to flash it into their /system/addon.d folder.

Link2SD - Not Mounting 2nd Partition after over a month of it working fine

Have been using Link2SD now for over a month without any problem.
I have a 64 GB micro-SD card formatted with 2 partitions. One is the fat32 partition for storing my own stuff (accessible through file explorer), and the other is an ext2 partition that is meant for Link2SD to "link" apps to. Both partitions are roughly of equal size (though in hindsight I would have like to make the ext2 partition smaller). I formatted + partitioned the SD card using MiniTool partition wizard in Windows.
As of yesterday the 2nd partition is not being mounted any more. I get the error as in attached screenshot. This error comes after Link2SD asks me to select what the file format of the 2nd partition is.
Because of this, all of the apps that are linked to the SD card in some way are now showing as not installed on my device (most are games, but one is a magazine-reading app). An attempt at reinstalling 1 or 2 of these apps through google play results in an error saying something like "there was an error installing this app".
I tried to search the forums on this error but most people have similar issues only when they are ~starting~ with Link2SD. I haven't found anyone who has the issue like this after using Link2SD for a bit of time...
I am wondering if there is a workaround to this. It would be nice to get those apps back onto the device at the very least (I have 4 GB of space to spare...), and at the very best get everything back to working condition again.
(note: I started to notice that certain apps started naming the SD card as a bunch of symbols instead of "SD card" as they usually do.....not sure if this is related or not)

*bump*
Should mention that I"m running a rooted device with stock ROM (took out many of the built-in apps).
I am debating whether to unmount the SD (physically take it out), and reformat the 2nd partition to ext4 or FAT32 and try again with Link2SD
What I'm afraid of is losing all those apps and not being able to reinstall them again....(as I am already getting errors with this in Google Play)

bsquared938 said:
*bump*
Should mention that I"m running a rooted device with stock ROM (took out many of the built-in apps).
I am debating whether to unmount the SD (physically take it out), and reformat the 2nd partition to ext4 or FAT32 and try again with Link2SD
What I'm afraid of is losing all those apps and not being able to reinstall them again....(as I am already getting errors with this in Google Play)
Click to expand...
Click to collapse
I've been having issues with it for a while myself. Sometimes after a reboot, a whole lot of apps disappear. I give it another reboot and they come back, but it's a pain in the arse because then I need to manually go place them back onto my home screen.

mightbme said:
I've been having issues with it for a while myself. Sometimes after a reboot, a whole lot of apps disappear. I give it another reboot and they come back, but it's a pain in the arse because then I need to manually go place them back onto my home screen.
Click to expand...
Click to collapse
I have tried multiple reboots....no such luck.
I'm reading elsewhere that the culprit may be Link2SD itself. Have emailed the developer (hopefully they respond).
The ext2 partition on the card is officially or unofficially fried. I really can't see anything on it (tried several linux file system viewers). I guess I'll keep the card mounted (with half the space technically gone) until there happens to be some way to deal with this issue....

bsquared938 said:
I have tried multiple reboots....no such luck.
I'm reading elsewhere that the culprit may be Link2SD itself. Have emailed the developer (hopefully they respond).
The ext2 partition on the card is officially or unofficially fried. I really can't see anything on it (tried several linux file system viewers). I guess I'll keep the card mounted (with half the space technically gone) until there happens to be some way to deal with this issue....
Click to expand...
Click to collapse
I ended up using a new card and the problem disappeared.... I'm guessing that the problem is with your card. Good luck

mightbme said:
I ended up using a new card and the problem disappeared.... I'm guessing that the problem is with your card. Good luck
Click to expand...
Click to collapse
I tried Link2SD with 3 different SD cards.
One was a test (4 GB card or less, can't remember now), to make sure the program worked.
The other was an 8GB card. Which I eventually swapped out for...
...a 64 GB card.
I had manually partitioned the 8 and 64 GB cards prior to using them in Link2SD
I also re-partitioned the 64 GB card a 2nd time when Link2SD (and therefore my tablet itself) stopped seeing the 2nd partition on the 64 GB card.
This "breaking" problem came up on both the 8 GB and 64 GB cards.
So one of the following at fault: my tablet, 2 different SD cards, or the app itself.
I am inclined to believe it's Link2SD as the reviews on the app store say similar things to what my problem is.