I store by type: Characters, Props, Poses, Textures, etc. These started out for the P4 folks. The Millenium folks get their own folders, and a sub-code for what it is. A texture for Victoria gets Vicky_TXT_whateveritwasdownloadedas.zip If it was for Vicky2, then Vicky2_TXT... Sub codes are MORPH, POSES, PROP(these include clothes), FACE... This makes it easy to sort and find a specific item (at least for me). Whatever system you choose or come up with, do make sure you back it up. Oh, and for CD/R's I like IMATION brand. :)

"Few are agreeable in conversation, because each thinks more of what he intends to say than that of what others are saying, and listens no more when he himself has a chance to speak." - Francois de la Rochefoucauld

Intel Core i7 920, 24GB RAM, GeForce GTX 1050 4GB video, 6TB HDD space
Poser 12: Inches (Poser(PC) user since 1 and the floppies/manual to prove it!)