Hello, you will need to check your operators manual to find out what is the total Micro Card size you can install in your Dash Cam. Most only accept 32mbs, but there are some which will accept 56 and 120mbs of storage. Hope this helps.
I believed that your Nintendo 3DS is only accepting up to 32GB maximum in its memory card. The 32GB microSD cards are compatible with the use of an SD card adapter.
It should work with that phone, unless LG has some odd restriction on the capacity of the cards it will accept. I would check the LG website to be sure.
Not familiar with Psvita, but my suggestion would be to call SanDisk Customer Service and ask them directly. That number is: 1 (866) 726-3475. Hope this helps!