Morning all , I bought a new 8TB Hard-drive online , I installed Windows 10 on it and it's only showing 1.99TB on my computer . I thought windows only showed 3TB as the largest size , but the bloke in the local computer shop said windows 10 had solved that problem . (Meaning I wouldn't have to change the format from MBR to GPT ) . He was wrong , I asked him how much his 3TB hard-drives were at first . He told me between £120 to £140 as computer equipment had recently gone up in price , I was expecting to pay about £70 to £80 for a 3TB drive . Is there anyway I can install windows 10 on the drive and keep most of the drive space , I know you don't get the full 8TB but most of it would be nice . Also if I had to format it to GPT will the programs all work just the same / Thank you . NettleWarbler .