Hi John, Yes you can safely delete the 3.5 files. if 35 is in the prefix, those are pois. if you move down the list and you get file names like: New_York_1-35.rmf New_York_1-35.tmb Those are 3.5 maps and can safely be deleted. Chris On Tue, 28 Aug 2007 17:13:58 -0400, you wrote: >Hi folks, > >While looking for the Holux documentation today, which I never found on >my gps card by the way, I discovered several map related files with the >35 prefix. Now that I have version 4.0 and the related maps on the >compact flash card, can I safely delete the 35 prefix files and make room? > >Thanks.