How to properly create a full backup of the PortableApps Directory?

I just reset my OS, and thanks to PortableApps, I was up and running after a quick copy-extract of a .7z file. So far everything seems to work fine, but I'm just curious if there's something vital that I missed by not using the built-in backup option.

I couldn't use the built-in tool since my PortableApps folder was in the root of my C drive, which means the tool would backup the ENTIRE drive. I then tried Toucan, but it was so vague/simple that it actually made it difficult to use (especially the rules, which after reading the manual, I still couldn't get working). I then created a simple shell script that utilizes 7z and rsync (via GitBash) to create a backup (I plan to set it up as a cron job): https://pastebin.com/TZaBy84F

This created a backup and I used it to, as far as I can tell, successfully backup the PortableApps directory and then extract it to my freshly installed OS. Instead of putting it in the root of my C drive, I opted to partition my drive and dedicate it to the PortableApps (For organization, not sure if this will bite me, but if it does I can move it back to the C root).

I'd like to know if there's something vital that the built-in back does, or if there's something that I should be doing during my backup, to make sure my PortableApps are safe.

P.S

Is there a way to create environment variables when the launcher starts? Kind of like how fonts are available to different programs, I'd like to specify some environment variables so that my portable version of VS Code can utilize them in its settings.json file.