Copy files into sd card which is mounted as mtp on Linux Command ine

mtp is media transfer protocol. These devices are mounted in /run/user/$UID/gvfs/mtp*

/run/user/0/gvfs/mtp\:host\=%5Busb%3A002%2C075%5D/Internal\ storage/Documents/

we can copy into this location

just use back slash (\) before spaces in file name (if you have spaces)) in cp command.

Similar way, you can use scp to copy from remote location

Examples :

cp /root/Documents/perl.pdf /run/user/0/gvfs/mtp\:host\=%5Busb%3A002%2C075%5D/Internal\ storage/Documents

or

scp 192.168.0.99:/root/Documents/perl.pdf  /run/user/0/gvfs/mtp\:host\=%5Busb%3A002%2C075%5D/Internal\ storage/Documents/