How to save a basic programme written in classic mode

Do you mean something like this?

Menu key on the joystick and make sure the d64 disk is selected then return to Basic

type SAVE"your file name",8

Power down the TheC64

Take the USB and put it in a PC

Copy the d64 to the PC

Use a program like d64editor to open the d64 on PC

Export the PRG file to PC and use or just use the D64 in e.g. Vice

Your USB stick isn't the "disk", it is the storage that HOLDS your disks. When using emulators (like TheC64), disks are actually represented by FILES -- the most common filetype being ".d64".

On TheC64 Mini, BASIC saves to the default "disk" file on your USB stick -- "THEC64-drive8.d64". [If you're using the Maxi, you can more easily select which "disk" BASIC will save to.]

If you want to see your Commodore-created file in Windows, you must have a program that will open and view the .d64 file.

I use "DirMaster" to do this. DirMaster will let you copy individual Commodore files onto or off of your .d64 "disk" file. (Your TheC64 device won't be able to see the file, though, unless it's contained within a disk "file".)

DirMaster also lets you view the contents of the Commodore-created files on your .d64, but warning -- BASIC programs are tokenized, and will not view in "plain English" like you might expect.