file size increases when migrating to RH7

Hi experts,
I am a Frame Expert, but a RoboHelp Novice. I created a new help project in RH7, based on an old one in RH6. It generated and now the R&D department is telling me that many new files are created and the file size is 10MB larger. Can someone tell me if all these files are necessary?

xxx.ali
xxx.BRS
xxx.cpd
xxx.glo
xxx.hhc
xxx.hhk
xxx.ign
xxx.ldb
xxx.phr
xxx.ppf
xxx.pss
xxx.stp
xxx.svn
xxx.xpj

Im sure that most of these file extensions were created in the previous version and that the file name itself (which I didn't list) is what is new, but before I tell this to the engineer I want to be sure.

Size is an issue because this software is being deployed from a flash card. the extra 10MB in space could be considered a blocker and stop our development.

Any help is great!