I use this one, as well as the ATS boxes, which makes little recolorable shoe box sized containers that fit on a desk, : https://modthesims.info/d/407111/storage-compatible-with-1-67.html
I use this one all the time. It has the additional advantage of your Sim being able to drop the box into the Sim's inventory. Having several of them for a Sim means that you can organize all of their stuff by type, and not have millions of items scattered throughout their inventory. You can also name the boxes (do a shift-click or control-click on them when in Buy mode, I can't remember which it is), which you can see when you hover your cursor over the box, whether it's in your inventory or on the ground. Again, makes it extremely useful for organizing items.
Unfortunately, the names you give the boxes do NOT last if you travel to a WA destination. It's not a bug with the boxes, it's just the way travel is programmed in Sims 3. You can always recreate the names on the boxes again.
You can drag the boxes out of your inventory to pull stuff out of them even if you aren't on your home lot, which again makes things very convenient. And there are some easy selections of "Store gems", "Store metals", "Store books", "Store paintings", and a couple of other things, to transfer some stuff over a little more quickly. (Unfortunately no "store insects", which I wish there were.)
