Are you sure you're in the right folder?
Here's where they are located:
PC: C:\Users\YourWindowsUserName\AppData\Roaming\RenPy\Lewd Town Adventures
Android: SD:/Android/data/com.{gamename}.program/files/saves Alternatively, you can use the file manager to find the correct save map where the Renpy save files belong.
Drop the save file there and it will work.