WD Blue SSD 250GB(3D NAND) 2.5inch Form factor. Works for PC and laptops.(As it is WD's mainstream SSD better than WD Green entry level SSD, but if you want very high end gaming performance then go for WD black SSD)
This SSD/all others SSD with 2.5inch form factor supports both SATA 2 & 3. They're forward and backward compatible.
But in bios you have to select AHCI protocol not IDE for your SSD for better performance and keep it as your 1st drive and default boot drive. For HDD you can select...

This is an excellent product from WD

I have used as a replacement to my old laptop Hard Disk. I use Windows 10 and old HDD slowed down performance of laptop.

The new WD Blue SSD 250 GB works really well.

Booting time is reduced.Apps run faster. Also the laptop heats a lot less.

I also did a RAM upgrade alongwith SSD replacement.

Significant improvement in performance.

very light weight and small in size. and very fast

Received the product earlier than the mentioned date. The SSD was easy to install in my Thinkpad and works perfectly fine so far.

Good product you can go for this

Honestly speaking. I really like this one .Got this for my dell 15 3000 series laptop. Speed is really good I can say about 3.5x fast than normal hdd. Booting time changed from 3 mins to 22 secs. I wish I could have brought the 500gb variant.A great deal after all.

Good speed

High speed, windows 10 installed only 8 mins, comes with 5 yrs warranty

Good .Writing a review after 1 month of purchasing

I can feel the change. It's buttery smooth and freaking responsive. Loved the way my PC just grown miles faster.

Note - I moved my HDD to caddy drive and it's functioning way better than earlier too.