Recommended FileZilla settings

https://www.siteground.com/kb/recommended-filezilla-settings/

If you experience any issues when uploading/downloading files with FileZilla, make sure you set the following recommended options in its configuration:

1. From Edit -> Settings -> Connection -> FTP -> tick Passive (recommended).

2. From Edit -> Settings -> Connection -> FTP -> tick Allow fall back to other transfer mode on failure.

3. From Edit -> Settings -> Connection -> FTP -> tick Send FTP keep-alive commands.

4. Restrict the number of simultaneous connections and transfers.