First,the SD card-type vehicle DVR is generally applied to those projects which not need too longer recording time and the stored data is not much.

If used in the projects that stores data for a long time, there may be a problem of frequently backup data. Unless to choose a large-capacity SD card , but in general ,the current SD card has a small capacity on the market, and the large-capacity price is very high, which may have a cost problem. In addition, the SD card has strict requirements for the socket, and it must be an excellent socket. Otherwise, the contact may be poor due to vibration or frequent insertion, the socket is loose, and the short circuit may affect the writing of the recorded data.

The hard disk type vehicle DVR uses a hard disk as a storage medium. The traditional disk-type hard disk has some influence due to the vibration because of its structural reasons. In comparison, there is not better than SD card type for anti-shock and anti-drop.

Therefore, the mobile DVR which generally uses a disk drive as a storage medium, has corresponding damping measures to minimize the impact of vibration on the hard disk.

3.5-inch hard drives are less susceptible to shock and are generally has problems. But the 2.5 inch hard drive basically has excellent

The seismic design can effectively prevent the problems caused by general vibration. Therefore, combined with the actual application, if the vehicle-mounted DVR uses a 2.5-inch

hard disk, the failure rate due to vibration is actually very small. The biggest advantage of the hard disk is that it has large capacity and low price, and is suitable for vehicles projects that need to store large amounts of data for a long time,and can reduce the labor costs of data backup.

Specifically, it is difficult to have a unified statement, which needs to be defined according to your priorities and actual needs.