If you’re only using your local machine you don’t really need to use device sync.
IF you have a laptop, desktop, or work machine, and routinely go back and forth then using device sync might be for you.
3rd Party Sync
DO NOT use a 3rd party sync framework like Dropbox, SpiderOak, etc.
Polar is not designed for this use case and it’s possible to corrupt your Polar data.
Polar cloud sync is optimized for use with Polar. Dropbox and other 3rd party sync systems introduce data write race conditions that can lead to corruption.
Additionally, the design for cloud sync supports more features and functionality than 3rd parties. We haven’t enabled some of these features yet but will be doing so in Q1 2019.