I am looking for a FTP client running on Microsoft Windows and with a GUI that allows more than 10 simultaneous uploads.
FileZilla is limited to 10:
WinSCP is limited to 9:
CyberDuck is limited to 9:
Any license and price is fine.
lftp sftp://user:email@example.com:22 -e 'mirror --verbose --use-pget-n=8 -c /remote/path /local/path'
sftp://= uses SFTP protocol
mirror= mirror mode
verbose= shows the files being downloaded
use-pget-n= number of segments, realy useful to speed up big files
parallel= downloads multiplier files at the same time
if you want to download files in parallel switch out