I think the real problem (specific to the eTrex 10) is the limited size of the mass storage area. Stripped of everything but system files, it has about 6MB of free space. In use I’ve had the thing complain about being low on memory when I’ve only used about 1/2 of that disk space — so either the GPS wants to reserve some of it for it’s own use, or there are other limits on internal memory besides than the mass-storage device.

It’d be awfully hard 2000 caches (whether in one or 500 individual files) to fit in that space unless they all had short descriptions and no logs.

“The eTrex 20 and 30 can hold up to 5,000 geocaches. The eTrex 10 can hold up to 2,000 geocaches. The thing to remember is all three devices have a limitation of the number of gpx files. When you load a geocaches one at a time, then this will create a gpx file. However, when you load a pocket query to the device, you will be able to put in a large number of geocaches that only use one gpx file. The gpx limitation for the 20/30 is 2,000 while the eTrex 10 is 500.”

Using the eTrex 10 as my example, I think that means I can have up to 500 caches in a single GPX file, but I can have multiple GPX files that will load at startup to reach the maximum of 2000 geocaches.

I’m going to test this later — but does my interpretation make sense?