Another user modified and added some files on Dropbox for Business. My laptop syncs to that Dropbox share.
After the above changes and additions (which should have been synced to my laptop), I changed the hard drive on my laptop. This is a secondary drive, not the boot drive. It is the target for the Dropbox sync. After the drive was swapped, I assumed the new drive would sync the files and folders as they were, but for some reason, the new files in the cloud were deleted and other files were restored to older versions.
If the new files didn't get synced, and never existed on my hard drive, why would the sync delete them from the cloud, if it never knew they existed?