Hi Earl,
I have looked into what Windows Explorer can do with 'zipped' files, and in the version included in Windows 7 at least, it does indeed 'extract' them if you first 'open' the archive (double click on it), select files or folders from the display, and then move them to another location.
You can use Copy (or Cut) & Paste or even just drag the selection to the new folder. The files in the new location are fully extracted and should then be usable on your 3000.
However if you simply copy or transfer the 'zipped' folder to a new location, it remains zipped.
So if you transferred the complete 'ExFile' download to a USB stick, the files in it will still be zipped and your keyboard won't be able to see or use them. If you actually opened the archive in Explorer and selected/transferred the files from there to USB, they should be OK.
I have always extracted zipped archives before trying to use their contents, either using Explorer's 'Extract All...' function, or using '7 Zip' for more control or for other compressed formats, and I will probably continue to do so even knowing the above.
Even if your problem is not because the files are still compressed, at least your query has taught me something about Windows that I didn't know, so thanks for that!
Regards
Ian