For that - finding in storage - I am thinking that ya need to figure out how you categorize an item - reproducably.  It needs to be filed in a way that two years from now, Ya still think of it the same way.  Finding something you know you have, is one thing.  Finding something that you forgot you have, or just bought on a whim, browsing the stacks, as it were,  Ya need to take time a figure out how YOU think.

  Hair,  I'm thinking:  very long, long, medium, short, very short, strange.

 Clothing -  is a problem for me.

Props -  mimic Target or another retailor?

If you have expansion products,  if a product comes with props,  if everything is not a a single folder = with subs,  how will you even know you have them?  The way these things come, the names used,  is eccentric and best.   Half the time, a template will not sort with its main file in a folder of zips, never mind any extension products.  Once unpacked, the naming is usually vendor ego-centric, certainly not Dewey decimal organized.

A product like P3DO Explorer shows a thumb for folder or zip, so you could render a jpeg of  what is in a folder and figure out how to name the render so it was what is picked to show.

Or - do a render of each item - name it with the item file name - and keep them in a card catalog type folder and do a slide show of the pix, stop on one you want and do a FIND using the render name.