need simple silent way to access cloud storage from Portable media

hi folks,

I produce a USB drive with apps for Christians

I have playlists of Christian radio in different languages. I need a simple way for end users to update these small files containing the radio playlists. They just contain URLs of the radio stations, but from time to time I need to remove dead ones and add new material. The playlists run from portable VLC player.

- The app needs to run from a script from a custom written menu
- it does what it needs silently. Its being used by user with not much IT background and probably don't speak English
- there needs to be a regular account for download only for end users, seperately from one for me for admin rights.
- it runs from a USB drive
- its free and ok for me to distribute as part of my product
- prefer free or very cheap

I need a tiny amount of storage, a few Megabytes.

I have been playing with FTP, but I hate it as its hard to manage and several free accounts I have been deleted for inactivity (which were be used!)

any ideas

cheers

Yosef