"Please be careful: There is a OneDrive-Client by skilion - this one obviously -, which is discontinued. If you're like me and don't use software no one has an eye on, I recommend a fork of this client by abraunegg (with the same name) which you can find via GitHub. If you want to check all of this, just search for skilion, abraunegg and onedrive. There's one small downside though: You'll have to compile the source code (choose the Ubuntu Version your Mint Version is based on, so Bionic for Mint 19). The instructions for compiling are great, you don't have to be an expert (if you can live with entering commands you don't fully understand, which is always a risk, but not in this case, IMHO). So 2 stars for skilion and 5 for abraunegg."