it can be set to record from 1 to 10 or 15 minute increments, which it creates a new file for each recording. If you put a 32 gigabite memory card in it it will record for about 15 hours recording time but of course it will have the recording in the length of file you select. I set mine for 15 minute recording time and when your disk gets full it will overwrite previouse files. Or you can simply reformat your memory card and it will start from the begining again. You can remove the disk and download onto your computer if you choose and then reformat.
I gave up on the learning how to use the cam and returned it to Amazon for refund. I'm an experienced tech type guy but the cam's poor documentation and shoddy operating system made it worthless to me. I would prefer to pay more $ ad get something I could actually use.
I suggest you return it and demand a refund. Maybe those jerks will stop selling such worthless, frustrating gadgets.
Have you tried setting it back to the original setup? Maybe take out the battery for a while (few minutes) then restart it. I have used it with the settings it came with and have never had a problem. It just records all my driving. I take a look after it's been to a mechanic & the recordings are fine.
No, I wouldn`t plan on any all night recording with this camera. I get about an hour of decent quality video with a 16 Gig disk. You may be able to set it to record longer, but you wouldn`t be happy with the video quality. If you want long term recording, get a camera that can record to your computers hard drive. This inexpensive cam will not do that.
It does not to have an input video jack.
Besides, the video quality of this unit is not good. You should consider this item instead : http://www.amazon.com/gp/product/B00BT7HVTQ/ref=oh_details_o09_s00_i01?ie=UTF8&psc=1
It is a little more than double the price, but it has a REAL 720p camera, and backup camera. (i have both)