Generally, branded cds and generics have the same format and use but with different quality in terms of lamination and tendancy to warp in slight change of weather conditions. Any CDRs are ok to store files as long as you store them in a well kept place.

Suggestion of recording for Generic CDs:
1. Write the data at speeds not more than 4x - to keep the data stable.
2. Have a cd cover for it.
3. Do not hold the cd in a flat position or you will damage the data surface of the cd because it lacks a protective coating.
4. If the cd is dirty, don't even try to clean it or you will loose your data.
5. Have at least extra backup cd. Write 2 generic cds just to make sure.
6. Do not store in hot surface or under the sun.


Hope this helps.