If you urgently need to transfer your data from an FTP client to amazon s3 ftp or S3 to FTP segments, then I want to make you happy, because there are a whole bunch of such solutions and you can try any of them and choose the best one for yourself.

Personally, my recommendation is Commander One. For me, this is a handy program for S3 FTP solutions, which you can use to connect to an FTP server and connect various cloud storage services as local drives.

It makes it easy to mount S3 as a local drive on a Mac, not least of which is that it works great as a Finder alternative.