If you add an external drive to your linux system using fstab, use the uuid of the drive instead of the /dev/sdb1 (or whatever it is called).
After a reboot your system might just swap around those identifiers for different drives and you've got a wonderful mess.
You can find out your drive uuid by listing your drives `lsblk` and then `blkid /dev/sdb1` (replace sdb1 with your device name from lsblk.
Then you can reference the drive in your fstab like so:
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