You need M2 2280 SSD, the best I recommend Samsung 970 Pro https://ssdrive.net/samsung-970-pro-1-tb because of good TBW and 5 years of warranty! If it's not in your budget you can buy 970 EVO
If your PC has SSD drive, make secure erase. If it is HDD, use HDD Low Level Format Tool two times in row. There is only way to make files not recoverable