Bridge & your devices · Collab Sync
Is Collab Sync like iCloud Drive or Dropbox?
Short answer: It keeps a folder the same on two Macs like a cloud sync does, but nothing goes to a server — files travel straight between the Macs over Bridge. Both Macs need Storage Studio, and they catch up whenever they can reach each other.
It does a similar job — keeping a folder the same on two Macs — but without any cloud. Your files go straight from one Mac to the other over the Bridge link, and nothing is stored on a server, so there's no cloud storage space to buy for it.
The difference: cloud services keep a copy online that any device can reach. Collab Sync needs both Macs to run Storage Studio and catches up when they can reach each other.