"Here’s a really helpful answer on how to get your computer to recognize the NWZ-S616 as a Mass Storage Device instead of an MTP, so then you can just drag & drop your files and movies without having to go through WMP.
This WORKED for me, and it’s simple, which is why I’m pasting it here.
“I first found that when I plugged my player into my computer it registered it as a MTP (Media Transfer Protocol) device and in turn never showed up as a storage device on my computer. I fixed this by going into my Control Panel -> System Icon -> Hardware Tab -> Device Manager button.
Clicking on the “System Devices” tab should have “Walkman” or MTP device. If it's not there, it will be somewhere else on one of the other branches. Right click on it and go to properties, now before doing anything it should say “Location — —— Location 0 (Walkman)” if not try unplugging the walkman and see if the MTP device you’re looking at is removed from the list, just to make sure it’s the right device we’re looking for.
If you’ve confirmed it’s the Walkman, click on the “Driver tab” and click on “Update Driver…”. Then click on the “Install from a list or a specific location (Advanced)” option and click “Next”. Now select the “Don’t search. I will choose the driver to install.” and click next. It should now bring up 2 driver choices, one being “MTP Device” and the other “USB Mass Storage Device”. Select the USB option and select next, it will then install your walkman as a USB storage device and after that’s done. It should be a matter of unplugging and plugging the Walkman back in and it should show up on your storage options in “My Computer”"
Thanks go to the chap who originally posted this (can't remember where). Hope this fix makes makes someone else as happy as it's made me!
