We now have a command [mybackups which you can use to backup the contents of your bank box. This is just a fun menu without any functionality, just to raise backup awareness

Some guidelines for backups:
Rule of 3-2-1:
Have at least 3 copies of your data (working set + two backups)
Have them on at least 2 different mediums (Magnetic HDD + Flash drive, more is better: optical drive like a DVD, cloud storage...)
Have at least 1 copy in a different location (possibly far away, at least 10 miles).
Cold storage / offline backup:
In all systems can get hacked, or a very intense virus/ransomware can affect all systems at once. So be sure to have at least one copy that is physically disconnected and would require you to manually/physically connect the storage media to access it.
Make backups periodically. If you're doing it manually, you can schedule it monthly, at the same time you pay your bills or some other thing that always happens every month.
Check whether the backups are actually working. Maybe you're using a program to back it up, it might not copy the data completely or just result in some error that doesn't get displayed. In case you actually have to use it, half of it could be missing, or could be very outdated.
In case you have to switch to a backup, label that storage medium with the date and a note that you started to use it as your primary dataset. And when you get your computer back from the shop, synchronize all the changes, then remove that label or add another label saying "no longer using as primary dataset as of [date]".
This last one I figured out back in January 2020 when my main computer crashed, (I had very outdated backups, but managed to partially transfer some of the data out)... I started working from different copies, and after I got my computer in working order it took a while for me to figure out what is the actual most recent copy of a bunch of files.