Disk management shows 1678 GB on a 2 TB external drive

[woodsmoke]

Have a 4TB samsung 870 QVO ssd drive. When fitted in an external usbdrive case it shows 1678 GB [ MBR ] 

When changed to GPT it still shows the same with no free space [ as before] 

I have tried-minitool partition  wizard & Aoemei partition assistant 9.5. - with the same results as above.

Tried on a 10 year old samsung and a 10 year old asus also.

l also  ran command prompt /diskpart to select disk-and clean disk. [ still shows 1678 gb  ]

I REALLY would appreciate some assistance

[banhien]

@woodsmoke 

That is the way manufacturers count their bits and bytes. Their drives can be 2TB but they are not because computers count them different way therefore manufacturers say 2TB and computers see 2TB = 2,000,000,000 / (1024*1024*1024) = 1.86TB or 1,863MB.

I don't know why you only get 1678 GB, could be Samsung counts a different way.

Regards.