Earlier I started to think of copying what I have to a format, in which I can listen to it.
I realized that the rest of my casettes are in so bad shape, it is not worth to copy them.
I fouded, what is better at the moment than MP3 is Cd, but there`s no way to carry so much cds with me, otherwise, I barely listen to cd at home.
So there`s no point in collecting cd`s regarding, how expensive they are related to all music is available somewhere in MP3.
The other is LP, which I prefer, regarding it`s quality, but that needs a studio- adaptor which can transfer data to a cd, the best is the quality the more expensive is the process, it is impossible to do it at home.
So as I see now, the best solution is to ask a frend if you need specially one music, otherwise to listen to the RADIO, which widens your info, and helps you get to know new bands better.