Go to /storage/emulated/0/MT2/sendto/ (create the folder if missing). Place any executable script (shell script .sh , or just a text file with commands) or a shortcut to another app. Now, when you long-press a file and tap "Send To" , your custom option appears.
How to use it:
In the era of data telemetry, MT Tweaker offers a "Silent Hardening" mode. mt tweaker hidden features portable
What it is: