We have one person who's OneDrive sync takes hours (it says it is syncing 100Ks of files, but he doesn't have that many) and then ends with a warning: OneDrive needs your attention. Remove files from all locations? You recently deleted 13908 files or moved those files out of your One...
This changes if you're a creative, either solo or in a business. Dropbox has better features if you work a lot with audio, video, and images. It's also better if you're ferrying larger files around. Still shopping around for office apps as a business? If you like Microsoft, then ...
Unfortunately none can be upgraded any higher. And that is the problem. In recent months it seems Microsoft have disabled older versions of OneDrive. The trouble is I have never had a problem with OneDrive (which is essential to my work) but bit by bit the older machines ...