Cruz T301: USB Storage Not Recognized
Right-click those links and manually download or here is the full link for USB driver.

Read this article on how to install the drivers.

After installing the drivers, see if you can see the Cruz from your PC. If not, reformat the SD card in the T301, put it in your PC, and copy a file to it. Then back in the Cruz and see if you can at least see the file. Though not a direct solution, at least you will be able to copy files back and forth.

If that does not work, try the same process with a different SD card. If that still does not work, try formatting an SD card in the PC, copy a file to it, then put it the Cruz. The idea is to get you to the point where something works.