Save 1TB DVD movie data, which is safer, mobile hard disk or ordinary hard disk (external)? Longer service life

I used to use ordinary hard disk+hard disk box to save files, but soon the hard disk box broke down and I bought a mobile hard disk directly, which was much more stable.

The main function of mobile hard disk is to save data and exchange data. Using it as an ordinary hard disk will definitely affect its service life.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.