You can speed up transfer of large files with multi-part transfers. A multi-part transfer divides large files and sends the parts over different FTP sessions.
Connect to a remote site.
Click the file you want to transfer in the Local Drives pane.
On the menu bar, go to File > Upload Advanced > Multi-part Upload.
Choose HIGH to split the file into two parts or MAX to divide the file into more parts.
Very large files can take time to combine, so you might have to manually refresh (F5) the screen after a large multi-part transfer to see the resulting single, combined file on the remote server.
You can only use multi-part uploads with servers that support the COMB command. Currently, only GlobalSCAPE Secure FTP server supports the COMB command.
Connect to a remote site.
Click the file you want to transfer in the Remote Pane.
Open the destination folder in the Local Drives pane.
On the menu bar, go to File > Download Advanced > Multi-part Download.
Choose HIGH to split the file into two parts or MAX to divide the file into more parts.
You can quickly gauge the effectiveness of the transfer by highlighting that item in the queue pane, and clicking on the small plus sign + next to the item name. The item will expand to show you all parts of the transfer with the average speed of each part.
Multi-part transfers will not occur for files less than 100kb in size, unless you change the minimum in Global Options > Transfer settings.
Multi-part downloads will not occur for sites that do not support resume downloading.
Multi-part transfers are not very effective for transfers in your own network.
Multi-part transfers are not very effective for modems slower than 56kb, because most FTP servers can at least transfer at that speed.
Multi-part transfers will not work if the FTP site does not allow multiple simultaneous connections from the same user or IP address.
Due to the server's added processor overhead when generating encrypted transfers via SSH and SSL, Multi-part downloads over these two secure protocols can be ineffective and are not recommended.