When to upload in binary versus ASCII mode
Most FTPS tools include a third mode that we recommend, an "auto" option, which decides for you which mode to use when uploading a file, so you don't have to think about it.
If your tool doesn't include this option, you can decide which to use based on which mode best suits your needs.
- ASCII mode for files that contain all text (such as HTML or text files).
- Binary mode for images and other media files, such as videos.