managing music archive multi-platform Options

[jes]

hello everyone
i store my music both in flac and mp3. today i format my ext hdd into ntfs and have few questions;
i use both mac and windows and i want to be able to manage it in both opt systems.
1 - i use foobar portable so i can bring my playlists with me as for mac i dont know what to use any recommendations on
which format fat32 ntfs to use and a portable music app for mac that i can install
2 - people accidently moves my albums while they try to copy the album to themselves, so what should i do
to make just collection folder read only and also should work for multi opt systems( and also hate thumbs.db and ds-store files)

im bit crazy sorry about that

thank you