FTP Proxies usually do not cache uploaded and/or downloaded files locally and you have to download a file again from a remote FTP Server every time you need it. The only way to prevent that is to have a copy of the file on your local HDD. That makes a mess on your HDD and does not work if many users of your organization need the same file. The best way to solve that problem is to cache files on a special proxy server and use local copies instead of downloading files again from the remote FTP Server.

     On the other hand, sometimes it's good to delay all upload processes until a specific time (e.g. night) but your users can't wait. The best way to solve that problem is to use Advanced FTP Proxy Server that caches all uploaded files locally and sends all cached files later by using a special scheduler.

     Finally, the cache feature of Advanced FTP Proxy Server is a perfect decision for companies who use FTP-backup software to backup their workstations. That gives them quick backups (upload is finished when a file is cached) and restores (because backup archives are cached and can be downloaded very quickly via LAN). Thus, you have two copies of your backup archives: the quick but not secure (proxy's cache) and the slow but secure remote server.