How i can copy only last 7 days files

Hi
How i can copy only last 7 days files from server to C:\xxx now i have this script

option batch abort
option confirm off
open sftp://root:xx@10.1.30.4 -hostkey="ssh-rsa 2048 01:63:15:"
synchronize local c:\xxx /home/trim/xxxx
exit

thanks

get c:\xxx\* /home/trim/xxxx/ -filemask=>7D
See https://winscp.net/eng/docs/file_mask#size_time