How do I backup encrypted files to an FTP server?
Compression to Zip (or equivalent) file/s. You can set Level Of
Compression to zero to simply 'wrap' the files in Zip/s without
re-compressing them. There are also options to not compress various file
types, e.g, JPG, MP3 (see Modify profile > Expert mode >
Compression > Compressed).
Compression to FTP requires one of two methods, as per
Simply include Encryption settings in whichever overall method you choose or need to follow in the article linked to above.