Thanks, I know all that but I've also found out that in performance tests modern 5400 rpm ones will pee all over older 7200 rpm ones such as mine and as I've never had an issue with the speed of mine I'm pretty sure 5400 ones would be fine for my usage.7200 is the speed of the drive that its spins up at 5400rpm is the lower speed also the green mark nowadays
blue is the next colour and black blue is 7200rpm and black is the 10,000 rpm ssd are supposed to nbe faster but there not as you need to look at read and write speed
also to consider is the read and write speed at same time
western digital and seagate are the older makes for hard drives so id choose between those makes myself for reliability ive had seagates and western digital go down on me even when they are brand new never opened out of the bag on a new install of a pc system
Hmmmm....time to run some diagnostic software then.before you go looking at replacing them Google this
"win 10 telling me my hdd are failing" minus quotes
This warning happened to my neighbours lappy,turned out HD's were fine,its WIN10 was the problem
I'm running Seatools on both drives at the moment so I'll see what the test results are before shelling out on new ones.