sd card - 32GB Micro SD shows only 32MB - Ask Ubuntu

so, phone has error (it turns off randomly), , because of that, 32gb microsd card got corrupted. there way fix de microsd card or recover data on it?

i put sd card on pc through usb adapter, , shows 32mb:

i tried chkdsk command on windows didn't work.

first things first:

if want data. don't writing card try rescue.

i happened have same problem on friends pc external hdd got volume entries corrupted , showing few mb instead of 60 gb. happened because did not safely remove drive pc. if card broken nothing except professional rescue service of data.

step 1: open terminal window

simply press ctrl+alt+t open terminal window.

step 2: acquire testdisk

testdisk available in normal ubuntu repositories install by:

sudo apt-get install testdisk 

step 3: rescuing data via testdisk

insert sd-card card-reader or plug in drive want rescue , fire teskdisk with:

sudo testdisk 

then see following in terminal window:

here can choose create log file highly recommend eventual troubleshooting. press enter , see next in terminal, can choose drive want rescue:

of course see drives in screen-shot have navigate corresponding drive , down arrow key , select @ bottom proceed left , right arrow key , hit return.

next see file-system selection in next screen-shot:

in cases tells in hint @ bottom file-system type select, or set corresponding type of drive. hit return again proceed.

in next menu (see screen-shot) select 'advanced' , should able see full partitions (maybe second partition on card). select , select 'list' files , them up.

you should see directory structure had on drive in next screen-shot:

see red ones on screen-shot; these deleted files can choose hide pressing h. navigate files/directories want rescue pressing , down arrow key (you can switch directories enter or go upward selecting .. entries.

to make selection of files want copy/rescue press : mark corresponding row green or press c copy single file. copying selection press shift+c. in both cases prompted directory view can navigate place save data/files. navigate want have data , press shift+c again start copying.

step 4: cleaning sd-card

after have data rescued time clean sd-card can use again full capacity. enter following in terminal (make sure select right volume card sdb in screen-shot take example here)

sudo dd bs=4m if=/dev/zero of=/dev/sdb 

this may take while run after there nothing on sd-card @ should able use reader , format again.