Can´t format, write nor delete files on a corrupted microSD card

Question

I have a SandDisk Ultra PLUS 16 GB microSD card (This exact model) and I'm trying to format it without any luck so far. It's the microSD card that I've using in my Android phone for 3 years without much trouble.

It currently has 7 GB aprox. of photos and music. I have all backed up so I don't mind destroying all the data. I plug it im my Windows 10 PC with an microSD-to-USB adapter. Haven't tried a microSD-to-SD adapter yet

I can't:

• Format the card
• Paste a file on it ==> "error 0x800703ee: The volume for a file has been externally altered so that the opened file is no longer valid"
• Deleting a file while being plugged with USB cable and phone ==> "Device is write protected"

I've tried:

• Right click on the drive (F:) and formatting to FAT32 ==> Windows was unable to complete the format.
• Idem but with NTFS.
• Formatting from the phone ==> It says format complete but nothing has been deleted.
• Using EaseUS Partition Master ==> Can´t format nor wipe data, error pops up.
• Using Mini Tool ==> Idem.
• From cmd.exe running as Admin:
  • Using chkdsk and then /f f: ==> "The type of file system is RAW. Chkdsk is not available for RAW drives" despite having the FAT32 label in it's properties.
  • Using disk part, attributes disk clear readonly (to remove write protection) and then clear ==> "data error (cyclic redundancy check)"
• Using "FolderMount" app on my phone with ROOT privileges to solve both start-up detected problems as explained in [this video][2] [2]:https://www.youtube.com/watch?v=5ep_-B_Eu6o and making another attempt at removing the write protection.

I don't know what else to try. I would probably have to buy another one but those things are not cheap here where I live and this case is really blowing my mind.

Thanks in advance!