Encore Pro Question

I erase my card every month or so-and print out a hard copy of a detailed compliance report-which gives me a weeks sampling of details.
What about purging Encore Pro occasionally-like once a year. The download list is getting a little unwieldy. On my Mac I'd just put those downloads into monthly file folders. and I'd have 12 folders for a year instead of all the downloads I now have. Or maybe it is just that I don't know much about how to organize data on the Compaq. Anyone have any thoughts.
PS-the info has come in handy in the last couple weeks trying to correlate atrial fib symptoms, hypertension, weight loss and CPAP reportsOnce the medical workup is done and I get everything printed out to document the year's process-I'd like to weed it out-so the question is---is there a compelling reason to keep all that data?
Of course I guess I can just create another patient. "Glorius Kay the Second", or third, or fourth......every Jan 1.

I go into Reports, and make a .pdf file, of the Dailys page 4-10, and file them by month, after I make sure I have what I want I delete the reports, just keeping the last two months on the computer.

P.S. I same data I want to keep on a second hard drive, and really important stuf gets burnt to cdr or dvd. Jim