Partition keeps coming back after deletion

Support and Help
1

I am trying to format a USB-attached memory card to FAT32. I’ve tried parted, gparted and the disks applet, all without success: when I remount the partition the original contents are still there.

Example:

GNU Parted 3.4
Using /dev/sdd
... etc
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      4194kB  15.9GB  15.9GB  primary  fat32        lba

(parted) rm 1
(parted) p
             
(parted) mkpart primary fat32 4194 100%
(parted) p                                                                
Model:  Multi-Reader -3 (scsi)
Disk /dev/sdd: 15.9GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type     File system  Flags
 1      4194MB  15.9GB  11.7GB  primary  fat32        lba
(parted) quit                                                             
Information: You may need to update /etc/fstab.
#

# sudo mount /dev/sdd1 /mnt/temp
# ls /mnt/temp
 Android/   Contacts_003.vcf   DCIM/   LOST.DIR/   Music/  'Voice Recorder'/

And there it still is! It’s the same with gparted and with “disks”. What am I doing wrong?

Mint 21 “Vanessa” with Cinnamon.

2

I’m going to close this question, as you’re not using an official Ubuntu flavor (thus outside of site/area rules)

This section of the site is for Ubuntu and official flavors as per

which includes

3

Flash drives are consumables, being built to be low price, rather than long lasting. Every write can cause specific bits/areas to no longer be changeable, and your details do not rule out problems with your media.