I'm finally getting around to upgrading my increasingly ancient, first-generation Google Pixel smartphone. In so doing, I'm going to have to figure out what kind of file synchronization service I can switch to. Dropbox has been my go-to for this kind of thing for years, and it suits my relatively simple needs pretty well (I primarily use it to sync my KeePass password database). However, Dropbox now caps the free tier of service to a maximum of 3 devices. I have more than three devices that I use it on (they were all grandfathered into the new rules), and activating my new smartphone will mean I no longer have support on my phone.
The primary competition that I see to Dropbox is both Microsoft's OneDrive and Google Drive. The former has better OS integration than the latter (from what I can tell), and neither one has such strict limits on the number of devices that can be used. Does anyone have experience with either of these services in terms of syncing files between devices? If so, I'd enjoy hearing about your experience. Are there other similar services I should know about?