My GPS has a warning sign that comes on when I turn it on saying 1000 GPX files loaded.Please consolidate additional files, I can't download any new caches I get can you tell me anything to fix it.
It sounds like the maximum number of GPX file types your GPS can manage is 1,000. You'll need to delete as many existing GPX files as there are new that you want to add, ie: If you want to add 150 new waypoints (a.k.a. Geocaches a.k.a. GPX files) you'll should delete 151 (or more) GPX files from the GPS. That way, you'll have 999 GPX files loaded - and won't see the message complaining of 1,000 GPX files.
Running with a minimal number of GPX files may allow your device to run faster - as it doesn't need to load and calculate distances for 1,000 GPX file points. Less can be more - if you don't do CITO, Webcam, Multis, etc. or any type that has a difficulty / terrain ratings greater than 2 or 3, don't even download them. It's just clutter for your GPS to track and manage.
Look at the filters to select the types you want - either on Geocaching.com or the software (GSAK?) you use assemble and prepare for loading them into your GPS.