What are four common causes of data loss?

Top ten causes of data loss are:-

Accidental Deletion

Computer Viruses and Malware

Physical Damage

Accidental Formatting

Head Crashes

Logical Errors

Continued Use After Signs Of Failure

Firmware Corruption

Power Failure

Natural Disasters

There can be many other reasons for data loss but all these have one solution. Use of a good data recovery software.