I have bought several HDs of this type on Amazon. Show all irregular problems identified by the PC. I thought this was a current problem. Well the first is no longer recognizable, and is known only as a raw volume. The hard drive was filled with relatively large backup files for long-term storage, ie it was a maximum of 10x and described connected to a PC; until they no longer worked. Checks on accuracy of the data were also carried out selectively and were always ok. The connection to different USB ports, with different cables, with separate auxiliary power supply - all to no avail. Now important data is lost. Of course (Murphy's Law), the data now used for the first time and the drive was not responding. After 3 months! The other plates of the same type, I will copy, as I no longer trust them.
If you read the other reviews, there are several with 4 or even 5 stars, the first received a defective HD, complained and got a new one. Why forgives then 4-5 stars is beyond me.