How do you think ads and tracking would be different if Linux gained a bigger share in the Desktop market? Not saying you are wrong, just genuinely curious.

I use duplicacy, it’s free as cli and pretty cheap if you want to manage the backup via gui. Restore by gui is always free and I would recommend it because it’s way easier to navigate the backups if you want to restore single files or folders.

Oh and regarding the large TIF files, what limits are you hitting? Most hosters allow to change the php settings like memory limit or max execution time.

As others said, encrypt your backup before sending it to your server. And can’t you upload the files to a folder outside of a document root or better outside of the www folder so there is no way to access it through the web server service?

So you keep using Windows to be able to install rootkits?

I had one Samsung Bar fail after two years, the second one still works.

At the moment I’m using a Philips Moon Edition USB stick but only since February. Can’t speak for long term usage and didn’t do any benchmark but I’m happy so far and the form factor would meet your criteria.