tell the store person your problem and make sure you can return it for full refund before you buy. If the store won't do this then find a store that will.
As to the compatibility problem you may want to re-post as "Panasonic Camera won't load pictures to my computer"
This look interesting;
System info: Windows XP Home with Service Pack 2
Compaq Presario computer (2002)
From my computer info - what little I understand of it - I have USB ports that say 500mA per port, 1.2 GHz and 240MB of RAM.
I bought a digital camera (Panasonic DMC-FZ5) about 6 months ago. I have been fighting with it ever since. Now, I'd like to purchase an MP3 player but before I do I would like to make sure I'm not going to have the same problems I had with the camera. This is what happened with the camera (I still have it):
I plug the camera into my computer via USB and it registers that there is something there but it cannot upload the pictures to my computer. It does however work on my roommate's computer and on the computers on campus (all three - mine, roommate's and school's - computers have Windows XP). I spent many hours on the phone with Panasonic but all they could say was "It's nothing wrong with the camera, call your computer manufacturer."
So I spoke with Compaq. They ran me through a whole check of my system and drivers and tell me there is nothing wrong with my computer. The USB ports work fine with my mouse, sound card and printer. Thinking it was a USB port incompatibility I purchased a SanDisk card reader for the camera. I can't upload the pictures through the card reader either. As far as the camera goes, I have resorted to going to the library on campus to load pictures, then e-mail them to myself and save them on my home computer. Needless to say, it's a pain.
So, I would like to purchase a SanDisk MP3 player that is supposedly compatibile with my system (of course, so is the camera...supposedly) but I want to make sure that it will work for me. Any ideas are greatly appreciated.