computer's back

I ignored to advice to buy a new computer. Instead I took the hard drive out and showed it to two different stores. The first store told me to check another store that I did not need to go to because the second store agreed to order a new one. Then they followed my email advice to buy a larger capacity but apparently that drive was mislabelled and did not fit. So I have a new drive of the same size as the old one and as usual I am not sorry to put the borrowed one back on the shelf.