How do I upload a large file via FTP?
The maximum FTP upload/download size is 5GB, above which you’ll need to use another method to transfer larger file sizes.
The 5GB limit is enough for most use cases and it is not very likely that larger uploads are needed by most users. 5GB is equivalent to 17.5 hours of 720p HD video.
If you need to upload a file that extends the FTP limit you can use tools like Rsync or WinSCP.
We recommend that you enable SSH and then use a client like WinSCP to upload over SSH. There are no limits in this case.
Here is a step-by-step guide on how to connect via SSH using WinSCP.