Yes, you can write over a file in the BB directory, but I do not suggest doing this until you fully understand the differences in an RB saved BB file and a BB saved file.

Put simply; RB files saved as BiaB files may lose some data.
So it is best practice to keep the original BiaB file (just in case) and save the RB file to a different name. This way you have both for reference. If you later feel comfortable deleting one or the other, fine, but losing work should always be avoided or intentional. At least in my opinion.

Like John mentioned, the BiaB files are pretty small, so think before overwriting them, as there isn't much to lose by keeping them for reference later.

I use a date stamp here in the file name to recognize them.

Example;
Biab file may be named SongName.SGU
My RB file would then be saved as SongName_RB_180309.SGU .. so I know the source of the file (showing an RB file saved to BB format) and the date I did it ..
180309 would equal YYMMDD (year-month-date) so 180309 = 2018-March-9th.

Just my way of referencing things.


Make your sound your own!
.. I do not work here, but the benefits are still awesome