Performing (Multi-Part) Transfers

A multi-part transfer divides large files and sends the parts over multiple FTP sessions. When multi-part transfers are specified, CuteFTP Mac splits large files into smaller segments, transfers each segment simultaneously, and then recombines them upon receipt. (You can only use multi-part uploads with servers that support the COMB command, such as GlobalSCAPE EFT Server.)

To perform multipart transfers

  1. Click CuteFTP Mac > Preferences.

  2. Click Transfer.

  3. Select the Perform multi-part downloads for files bigger than (MB) check box, then specify a minimum size threshold for multi-part transfers to occur. (Multi-part transfers are not effective for small files.)

  4. Click OK to exit the Preferences dialog box and save your changes.

  5. Connect and transfer files as normal. Files larger than the minimum size you defined will be transferred in multi-part mode. Note the progress bar is split into multiple parts and will track each part individually.

The FTP site you are connecting to must support the resume (REST) command. Throughput GETs are dependent on many factors, such as your network speed, the server's bandwidth output per connection and more. CuteFTP Mac automatically determines whether to use 2, 3, or 4 parts for the multi-part transfer. The formula for determining how many parts to use is:

number_of_segments = MIN((int)((file_size_in_MB) / (min_size_for_seg / 2)), 4)