Can't use new MicroSD Card

I have a 16GB microsd that works no problem, but I'm trying to upgrade the storage size.
I tried pretty much everything to get this new microSD card working, but nothing works.
I tried both a Sandisk and a samsung, they work on my girlfriend's phone no problem (LG G3).
I can't mount it, it tells me that the SD Card needs to be formatted. It won't format on the phone, and I tried formatting in windows several times but nothing works.
I can't help but feel this phone is defective, or is there some special way I should be doing it?

Thanks

Support of 64GB Microsd Card

Hello please help me..I have 64gb class 10 Sandisk MicroSD Card..But it's not supporting on my Micromax Canvas A1..After searching alot on google i found that all android supports till 128gb if we do a FAT32 formar to it..I have already did it..But nothing works for me..Please help me..I have my only 64gb microsd & i want to use it..

Using ext4 microsd

Hi,

I have a rooted Medion Livetab S10346 running KitKat and have a problem using an ext4-partition on a micro-sd card.

I created a mountpoint as /storage/ext4 (with uid u0_100 and gid sdcard_r) and as root I can mount the partition like this:

Code:

---

#mount -t ext4 /dev/block/mmcblk1p2 /storage/ext4

---

And I can use it as root without problems. Here is how the mount-point and the content look like:

Code:

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#ls -ld /storage/ext4
drwxr-xr-x  u0_a100 u0_a100    2015-09-09 00:24  ext4

#ls -l /storage/ext4
-rw-r--r--  u0_a100 u0_a100  6 2015-09-06 00:24 bubba.txt
drw------- u0_a100 u0_a100    2015-09-06 00:23 lost+found

---

As you can see everything is owned by u0_a100 which is the usual non-root user-account on my device.

What I want to achieve is to use the ext4 partition from the non-root account, but this is where I run into problems:

Code:

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>ls -ld /storage/ext4
drwxrwxrwx u0_a100  sdcard_r      2015-09-06 00:51  ext4

>ls -l /storage/ext4
(nothing)

---

So the mount is not visible from the non-root account, all I see is the mount-point.

What am I missing?

case with built-in micro-sd reader?

Given that the Note 5 does not have a built-in microsd slot, i was wondering if there was a case available that hand a built-in micro sd reader that interfaced via the usb-otg.

Thanks

[HELP] failure on microSD and wont even stable load on Windows/Ubuntu, CALL for help?

This is a post, asking for some short of last chance of help, before calling the professionals

Yesterday, my phone went off (with quite a battery still) and when restarting a worrying message appear : "Impossible to mound SD card, it may be corrupted".
(and of course, with a outdated backup on my pc for weeks...)

I have read other posts, and nothing seems to help:

http://forum.xda-developers.com/show....php?t=1917058
http://forum.xda-developers.com/showthread.php?t=367912

The microSD is a Transcend 16GB class4, not sure this info is key, but let it be know.
As Android doesn't load, I switch to PC, I plug the microSD into a USB adapter and go

First on Windows:
I try to load content, SD appear for few seconds and then disappear again.
On DISKPART >> list volume, The error message: "Virtual Disk Service Error: the object has been "

Try ZAR-X, and it keeps on "Enumerating devices, please wait", and does not do anything else

As things get ugly, I switch to linux (Ubuntu)
Trying to load on folder browser I got:

Unable to mount sd-ext
Error mounting /dev/sdc2 at /media/ubuntu/sd-ext:
Command line 'mount -t "ext3" -o "uhelper=udisk2,nodev,nosuid" "/dev/sdc2" "/media/ubuntu/sd-ext/" '
exited with non-zero exit status 32: wrong fs type, bad option, bad superblock on /dev/sdc2,
missing codepage or helper program, or other error
In some cases useful info is found in syslog -try dmesg | tail or so

or:

Error mounting /dev/sdc2 at /media/ubuntu/sd-ext:
Command-line `mount -t "ext3" -o "uhelper=udisks2,nodev,nosuid" "/dev/sdc2" "/media/ubuntu/sd-ext"'
exited with non-zero exit status 32: mount: /dev/sdc2 is not a valid block device

or:

Unable to open folder for 15GB Volume
Error when getting information for file '/media/ubuntu/ES64-FA45': No such file or directory

went back to basis and run "sudo fdisk -l" and here I notice similar behiviour that windows, during the first 30 seconds or so after inserting the microSD/USB into the computer I it apear (among other disks) :

Disk /dev/sdc: 15.9 GB, 15931539456 bytes
255 heads, 63 sectors/track, 1936 cylinders, total 31116288 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d450f

Device Boot Start End Blocks Id System
/dev/sdc1 1 29617187 14808593+ c W95 FAT32 (LBA)
/dev/sdc2 29617188 30617187 500000 83 Linux
/dev/sdc3 30617188 31116287 249550 82 Linux swap / Solaris

but after those 30 second, no trace of the usb in the fdisk-list


I wonder if there is something else I can do from my limited hardware availability, and even that following attempts could damage further the microSD

On mention posts, it is told about dd_rescue :

On Linux can try dd_rescue. It creates copy like normal dd but it does not abort on errors.
Copy card to file and then mount this file like drive
http://forum.xda-developers.com/show...6&postcount=19

is that something I could apply? OR something else I could do on my side?

or my last chance would be to put the SD in the hands of professionals and let do the job with open-heart-surgery-microscopy-tools?
(like those on : http://card-recovery.biz/us/service.php)

The data I have in the SD and not in the backup is enough valuable indeed to go that way, (on the other hand, house&personal insurance may also cover part of this cost)

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By the way, two more things:

S-OFF, on one post, it is said:

S-OFF
This actually sounds a lot like what can happen to SD cards on some HTC devices if the S-OFF goes bad
(http://forum.xda-developers.com/show....php?t=1917058)

but I can't find what shrike1978 was refering to

Real Time backup sync

Even I do regulary backups (or I intent to) I come to this situation.
Is there a tool/app/configuration that allows to have a real time synced copy of the contents on the SD (and preferable internal memory of mobile also) so chances of going broke are reduce to nearly ZERO ?
(In my PC I have of course a RAID, really bad there is no such options on Mobiles at cent costs on SD nowadays)