find all the files that have been modified in the last 4 days ( daystart is used to check files according to date i.e, all files modified from currentDay-4 00:00:00 to current day) and copy them to folder.
find . -mtime 4 -daystart -exec cp -a {} /home/devnet/fileshare\$ on\ X.X.X.X/RECOVER/ \;