How can I recover a file from a JVC Everio GZ-MG37U

First things first: DO NOT take any more videos or pictures with the camcorder(memory card) that you want to recover files from in case you may quite possibly ruin your chances.

Then take the memory card or hard drive out of your cam, and connect it to your computer as it should appear as a "Removable Drive" or put the card in a card reader attached to your PC.

Then install this software Wondershare Photo Recovery (recover videos and audio files too) on your computer. Then start to scan and see if your deleted files can be got back. Get the program from:

For Windows Version
For Mac version

Remember - Do NOT try & write anything back to your camcoder(card or disk) until you can recover your files safely!