Sign up and test it.
Appoxo
The easy route: Rent a seedbox.
I will thank both for no business with either of them.
An OS is a tool.
And you are a tool if you use the wrong tool for a purpose.
E.g. an essential program that only runs on windows and is either impossible or troublesome to run elsewhere.
No need to shell out money. They open effectively every other friday (meaning any major holiday like Eastern, summer holiday, black friday, Christmas, ...)
r/opensignups and the like.
Und das ist gut so!
Deploy the backup (or some part of it) to a test system. If it can boot or you can get the files back, they work.
In theory you could setup a cron with a docker compose to fire up a container, sync and once all endpoint jobs are synced to shut down.
As it seemingly has an API it should be possible.
Only back up the essentials like photos and documents or rare media.
Don't care about stuff like Avengers 4K that can easily be reaquired
I cancelled my premium (lite) sub. Don't need that service for $60 per year