Mysterious Hidden PSP Files

[Animixer]

Does anyone know what these first three files are? (.fseventsd/.Spotlight-V100/.Trashes) Also the "._.Trashes" and ".DS_Store" files?
I want to delete them, but I have no idea what they are for...would like some explanation on what these are. Oh these are located in the root of my PSP. Custom Firmware 4.01 m33-2 PSP 2001 in case you needed to know. Memory card is MagicGate supported, 4 gigabytes, not Magic Memory Stick formatted.
Thanks.

[Ragna]

i have seen mysterious files apear once in a while on the root but usually there not useful. usually the psp should only have the xmb files, the seplugin file, root file, and if you use CXMB you have a CXMB file but i never seen though before in any of my clients psps.

be aware of whats going on though because i personally found a "recycler" file in my psp that i never know was there. after a anti-virus scan it turn out to be a worm that messed up my computer.

i don't beleive there necesary so i think you psp will be fine if you delete them.

(LOOK FOR A SECOND OPINION THOUGH CAUSE I COULD BE WRONG)

[Ostinato]

You're on a Mac aren't you....or at least have used one with that MS? Delete them.

[Animixer]

You're on a Mac aren't you....or at least have used one with that MS? Delete them.

Actually, you're right I was on one. I used my memory card as an alternative as a flash drive for college and accessed it through a Mac about three times. These are files from a Mac? I guess it would make sense seeing that I never got these files before with Windows. Thanks.