If you would like to add many MF keys at once, you can use this method.
1) Put the iCopy-X in PC-Mode
2) On the root of the device, select the folder named "keys"
3) Select the text file "mf_user_key"
4) Add your keys under "# You can add some key if known" (you can copy and paste bulk keys, or you can enter one at a time.
5) Save the text file and stop Pc-Mode.
6)Your done, you can use Autocopy now as normal.