It has nothing to do with the age of your computer. It has to do with how many locations you run the bot. The more (different) locations, the more mesh files that are downloaded from the mesh server. Edit: In the event you are going to reformat or similar, you can copy all the mesh files from the default directory and back them up. When you restore them at a later time, you will still have all the mesh files and will not get the "Loading Tiles" / "Downloading Mesh Files" messages as often. And, the bot will navigate much smoother.
I bought and put together a new computer in May, since then its built up to 492MB by the looks of it ^^
341 MB .... and im crying for more harddrive space....why do mesh ONLY download to my C Drive (which is roughly large enough for windows....NOT THESE MESH) instead of my E:
There is a full google repository out there to pre download, it's definitely better then let it download from HB itself.