870 EVO SATA III High-Speed Solid State Drive (SSD) - Available In 1TB, 2TB, and 4TB

So, at first, I thought that this was great. I installed it correctly. Partitioned the drive successfully and no issues. Then I tried to download to it multiple times. It reaches around 50GB used and then constantly disconnects/reconnects or simply disappears completely. I have tried everything to get it to work correctly including going through the bios, trying a different sata cable and even trying to use a different port. Nothing works. It does the same every time. Gets to 50GB used and then bottlenecks the write speeds to under 2mb/s. Couple this with the fact I purchased this on the 12th Feb and it only just arrived today (9th March) has left a negative feeling. I feel like I have been scammed. DO NOT BUY

the disc is dead. Drive is not detected by systems. tried on a computer and laptop. launched many programs. in bioses, the same is not determined. introduced various commands. to no avail. I work as a system administrator - the disk is really dead

4 x 4TB 870 EVO SSD for 119.00GBP including delivery. Arrived this morning tested and all working fine.

it can not hold more than 98GB, while it says 4TB.