


My iMac is connected to a large RAID 6 array, and my laptop is connected to a USB-powered 4 tb external drive. My photo library is currently just under 3 tb, so I have a 3tb dropbox plan ($20 per month). Even with standard previews, 1:1 previews, and smart previews, and preferences set to force LR to use the smart preview for editing, online-only files in dropbox download immediately whenever a thumbnail appears in LR. I did extensive testing with Selective Sync and determined that it simply does not work with Lightroom. There have been glitches, but overall, it works great and much better than other cloud solutions.

I have used Dropbox for years to store and manage my entire photo library between two computers.
