One thing I've learned in sharing mixes in progress with clients and so forth is to avoid any and all special characters in file names! Between the number of people using Windows OS, phones, and so on...
A comma though?!
Yeah, cloud accounts are a great convenience for sharing. Do not under any circumstances trust them for an actual backup!
No arguments at all for getting fancy with NAS, raid configs, and all that!
Simple:
Use USB connected externals for backup volumes.
Keep your drives 1:1 with primary:backup! So you can clone entire volumes. Manual curating leads to missing something and losing something!
Get a cloning app!! (I like Carbon Copy Cloner)
Clone every drive volume to it's backup volume. Especially your system drive! Cloning copies the whole volume including the cryptic OS files.
This also leads to computer screwup and recovery for dummies.
Gonna try something?
First make sure your backup clone for your system drive is current.
OK, install whatever you were after.
Everything is broken now?
Boot from the clone. Clone it back to the primary. Reboot from your primary again. Magic "reset" that takes 3 minutes. (Only new/modified files are copied when you clone.)
You don't actually have to figure out what you did or how to undo it.
Next level:
Use the cloning app to make a disk image file of your system drive. (It's a feature.) Save that image file as a master backup. It's your "installer file" for your personal system if you will. Now you can recover when you accidentally overwrite your backup clone with something bad.