Default Advanced Settings
By default, these settings are used for all sites, but you can override them by modifying the advanced settings in Site Manager separately for each site.
Connect Timeout
Number of seconds the 3D-FTP will wait for server to respond when making the connection.
Number of Retries (connect) Number of retries before giving up the connection attempt
Retry Delay (connect) Number of seconds to wait between connection attempts.
Transfer Timeout If there is no data transferred in NN seconds, tries to restart and resume the transfer.
Number of Retries (transfer) Number of retries before giving up the transfer
Retry Delay (transfer) Number of seconds to wait between transfer attempts.
Enable Cache. Cache remote folders for N hours
Cache is special local storage for remote file listings. This means that instead of requesting file listing from the remote server every time the folder is changed, the file listing is read only once, and then saved to local storage for later use. This local copy – the cache – speeds up the folder changes dramatically. You'll see the problems of caching when remote server folder contents changes, but due to caching, local cached copy of the contents is shown. And therefore you do not see the current file status, but instead the old one.
But as caching makes folder changes much faster, its use is recommended, and you can here control how long the cached copy of file listing is stored. So if you have setting of 12 hours, local cached copy is used for 12 hours before it is re-read from the server. You can anytime flush the cache (=force the file listing to be re-read from the server) by selecting Refresh-command from the menu or hitting F5-key. The cache is re-read automatically after each file transfer.
As for other Advanced Settings, you can control this setting per site basis (from Site Manager).