Need to upgrade the HDDs in our server, it currently has 5 x 1TB HDDs (RAID 5 Array) in it running 4 server VMs. It's running out of space so I was thinking of upgrading to 2Tb SSDs but there's a huge difference in prices:

  • Samsung SSD 860 Pro MZ-76P2T0B/EU £421
  • Kingston A400 SSD SA400S37/1920G £155
  • Crucial MX500 CT2000MX500SSD1 £186


Some are way more expensive than the Samsung, but I thought the point of SSDs was that they were inherently quicker and more reliable than an HDD so why such huge price variation? And what should I be looking to buy?