A couple of questions:
1. What Linux Mint version are you using?
2. Can you show the contents of
/etc/fstab? Just launch a terminal and run
and copy/paste the output here, please.
1. Description: Linux Mint 20.3
Release: 20.3
Codename: una
2.
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p2 during installation
UUID=6cb14398-864d-409b-9cc7-11c9025beb79 / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=A409-646B /boot/efi vfat umask=0077 0 1
/swapfile none swap sw 0 0
# /data drive usb
UUID=0f83ef91-d750-4c99-a2a9-bbd84f9e2dcd /home/huygrogbro/usbdrive ext4 defaults 0 0
UUID=78740016-b4ec-46b5-99b8-5b8ac8f32051 /media/harddrive ext4 defaults 0 0