Effect of Folder Settings on Syncs
Syncs that pull files into a Files.com folder are affected by that folder's Folder Settings.
For example, when a Folder Setting is configured to Limit uploaded files to certain file extensions, any syncs to that folder are also subject to that setting, and only files matching the allowed extensions sync successfully.
When syncing files to a folder with Folder Settings that alter file contents or filenames (for example, GPG Encryption, GPG Decryption, or Filename rewriting rules), enable the option to delete files from the source.
A sync to a destination folder with a Folder Setting that alters file contents or filenames will not run unless the sync is set to delete from source. This prevents repeated syncing of the same files every time the process runs, which would lead to high transfer usage charges with no benefit to you.
Check the Folder Settings of the destination folder to determine whether a Folder Setting affects the outcome of the sync.