Thank you for contacting the GoPro Support Team and we're sorry to hear that you're experiencing freeze up issues.
Can you please attach to your email a photo of the SD cards you're using. In the meanwhile, please follow the following instructions for the sake of troubleshooting.
Let's try re-updating your camera's software. Give it a try, and let us know how it goes. Here are the instructions:
1. Reformat your microSD card in the computer. Here are some links that show you how to reformat an SD card (or MicroSD card) on your Windows computer. We also wrote out the steps for you below.
1) Connect the SD card to your computer by using an external card reader. Save all the files from your SD card that you want to keep to your computer before moving to step 2. Formatting the SD card deletes all the data off of the card.
Note – If you’re using a MicroSD card, please insert the Micro SD card into the SD card adapter that came with card. Connect the SD card adapter to your computer by using an external card reader.
2) Click on the Start Menu in the bottom-left corner of your screen, then click on “Computer”. Note – if you have Windows XP, click on “My Computer”.
3) Find your SD card in the “Devices with removable storage” list. It’ll be listed as a “Removable Disk”.
4) Right-click on the Removable Disk to open the dropdown menu. Then click “Format…”.
5) A new window will open. In the Format window, do not change the “Capacity”. Select the correct “File System” though. If you’re using a 32GB or smaller card, select FAT32 as the File System. If it’s a 64GB card, please select EXFAT.
Note - If you are using a 64GB card on Windows XP, you might need to install an update for the computer in order to have the card recognized. Here is the link:
http://www.microsoft.com/...oad/details.aspx?id=19364
6) Make sure “Quick Format” is checked at the bottom of the window, and click the “Start” button. A message will open telling you that all of the data on your card will be deleted. Click OK.
7) The bar at the bottom of the Format window will advance, and upon completion, you will be given a Format Complete notification window. Click OK, and you’re done. You can eject the card from your computer by right-clicking it, then clicking “Eject”.
2. Power off your camera and eject the microSD card. Set your microSD card aside. In the steps outlined below, you'll need to drag a folder from your computer to your microSD card. Find your 'microSD card to USB adapter' or your 'microSD to SD card adapter' and set it aside for later. Here are some pictures of the adapters if you're unsure of what they look like.
3. Click on the link at the end of this step, which will download the UPDATE folder to your computer. Note - if the UPDATE folder is zipped once you download it to your computer, meaning that you see "UPDATE.zip" instead of "UPDATE", double-click on it so that UPDATE.zip unzips to give you the UPDATE folder.
If you are a Windows user you may need to create a new folder called "UPDATE" on your desktop and move the contents of UPDATE.zip into this new folder.
HERO4 UPDATE
4. Connect your microSD card to your computer using the adapter you set aside in step 2, then drag the UPDATE folder to the root level of your microSD card. Here's an article that explains how to find the root level of your microSD card.
5. Eject your microSD card from your computer.
6. Make sure your camera is powered OFF, then insert your microSD card back into your camera.
7. Power your camera ON. In a few seconds, the camera's screen will flash "UPDATING" with a picture of a down-arrow and a camera to indicate that it's updating. It'll power OFF/ON 1-2 times, and show a message saying "UPDATE SUCCESS".
The UPDATE SUCCESS message means that the camera successfully re-updated.
8. Lastly, I recommend that you reformat your microSD card again in the camera so that you start with a fresh card the next time you use your camera.
This should clear things up for you. Please let me know how it goes.
NOTE: Please try without the SD card and check if it freezes yet.