Delta Drive, Delta Trust & My Drive · Delta Drive on your Mac
How do I keep a Delta Drive folder available offline?
Short answer: Right-click the folder and choose Always keep on this Mac. A full copy stays on your Mac (or your fast drive), kept up to date, and opens with no network.
Right-click the folder in Delta Drive and choose Always keep on this Mac. A full copy is kept on your Mac and updated in the background, so those files open with no network at all.
It uses disk space, which is why it's a decision you make per folder rather than a switch left on everywhere. When you have a fast external drive set up, the copy goes there. The folder's mark shows Always on this Mac, hollow while the copy is still arriving.