Once I moved over to a PC, backing up was such an easy thing to do, no more stacks of floppy disks…
So going back for the first time in 30 odd years to something that is stand alone (Tracker Plus) and I’m out of the habbit of backing up.
Every track I’ve been working on since I got it. All gone.
Call your SD card and tell it you love it.
Oh crap dude! I’m so sorry. Sending lots of hugs 
!
But yes - good message worthwhile to be repeated:
You never know when a card might crap the bed.
Regarding backup strategies - i personally backup everytime i “finish” a track. This way i only have to backup one project (which is fast) and i’m good. And if i loose one project it doesn’t hurt.
“i personally backup everytime i “finish” a track”
And that’s why I’ve never backed up 
Ah crap .. but you noticed how i put finish in airquotes? find that airquotes stage for yourself and do it then 
Similar story here when a couple weeks ago I took my SD card to the Mac to copy some new samples with an USB3 SD card reader I use regularly. Copied it all but it wouldn’t eject… After some tries I just pulled the reader, took the card but the tracker didn’t detected it when tuned on.
When I’ve put it back to the Mac, it didn’t recognize the card as well… My PC didn’t even.
The card died from just pulling it without eject… What a pain loosing some songs and a ton of samples nearly organized.
Backups are vastly underrated. Some do them, some even test them (it’s not a backup unless you verify restoration).
My condolences for the lost work. I lost a hard drive once (around 1998) with EVERYTHING on it. It is hard. I could actually see the files becoming inaccessible in batches until the drive just died on me.
Since then I back up (in)frequently and use a deduplicating backup software to do so (https://restic.net/, GitHub - restic/restic: Fast, secure, efficient backup program). There are plenty of options to choose from (https://duplicati.com/, https://www.borgbackup.org/, rustic as mentioned) which are Open Source and after some setup almost hassle free if not fully automated to back up whenever you connect your device to your computer.
Don’t hesitate, set it up!
+1 for borg and if you prefer GUI there is vorta for you!
And rsync of course!
Didn’t know about vorta, thanks!
And then there was https://rclone.org/
So many options, one for everybody!
rclone is an amazing piece of sofware as well!
It’s just a front for a borg repo which remains accessible via CLI
Most people blissfully wander about assuming that their laptop, phone, camera and anything with important data on it will operate without issue until they upgrade to the next thing. I tell people “you should assume any important data that you have on only a single device is already gone.” They always give me this incredulous look. 
If I don’t have important data backed up in at least two places I can’t sleep.
I had a laptop hard drive spontaneously die once. I wasn’t worried. I had a backup. I hooked up the backup drive and “click, click, click…”. Yep it had died as well.
So, maybe keep two backups. 
