Permissions Required on Remote Servers

When using a Remote Server, Sync requires that the account on the remote server has read, write, and list permissions for the targeted folder and its sub-folders.

Source folders must be readable and destination folders must be writable. List permission is required on both sides so that Sync can enumerate the remote folder and determine which files need to be transferred.

Sync does not delete a file in order to replace it. It writes over the file already at the destination, so replacing files needs no delete permission.

Delete permission is needed in three cases. A Sync set to remove source files after transfer deletes them from the source. An SFTP server that refuses to replace a file in place sends Sync back to deleting the old file and writing a new one. When an FTP upload finishes at the wrong size, Files.com deletes the partial file rather than leaving it on the server.