Some time ago I installed Raspbian and Kali on two microSD-cards. It was also some time ago when I tried to format them - without success. I put them aside. Yesterday I thought I try again. I used a couple of tools suggested in previous posts on Stackexchange, and other sources on the internet. But no tool was able to format those cards to their initial state.
- Card #1: SanDisk Ultra 16GB Class 10
- Card #2: Transcend Premium 32GB 300x Class 10
Both cards were flashed with the OS image by using Win32DiskImager.
I double (and triple) ensured that the cards are not in read-only state.
Used tools (without success):
- Microsoft Windows Diskmgmt
- Microsoft Windows DiskPart
- SD Memory Card Formatter by the SD Association
- Canon EOS 550D
- Canon IXUS 80IS
Shows up on Windows as drive that needs to be formatted. In Diskmgmt it is shown as 31MB RAW (no errors). There is no unassigned space or anything left. It really looks like just 31MB total space available. When I try to format it, it says "formatting wasn't finished without errors". Both cameras just see a faulty microSD-card and weren't able to vanish it either. DiskPart only works till I try to use create partition primary, which fails with "no free usable extensions [...]".
Shows up on Windows as drive that needs to be formatted. Only the first partition with boot utilities is visible. In Diskmgmt it is show as 61MB FAT (no errors, primary partition), 6,78GB (no errors, primary partition) and 22,65GB (no assigned). I've been able to use the format function of my camera but afterwards all files are still there, untouched.
In both cases, I wasn't even able to fulfill the task by using gParted.
I am really at my wits' end. No program was able to reset the cards to their initial state or flash a new OS. Am I using all tutorials and posts on the Internet wrong or should those two microSD-cards go straight to trash?
I appreciate your help and advices!