Not getting the full memory space?

[Tuan]

I've notice this with my ssd and m.2.  860evo 1tb, but only show 931GB as free. where are the other 69gb? same thing with my ADATA XPG SX8200 Pro 1 TB M.2, showing 953 gb free. Is this normal or am I doing something wrong? 

[WereCatf]

3 minutes ago, Tuan said:

Is this normal or am I doing something wrong?

It's normal. Manufacturers like to report their devices' sizes in multiples of 1000 bytes whereas Windows counts it as it should be, ie. in multiples of 1024 bytes, so that's why the disparity.

[Oshino Shinobu]

It's a difference in units. 

 

Windows is actually reporting in Mebi/Gibi bytes, which is base 2. Mega/Giga bytes are base 10, which is what the drives are advertised in for capacity. 

 

1TB drives will almost always show as 931GB in WIndows. 931 Gibibytes is equal to 1000 Gigabytes.

 

Windows actually uses the wrong abbreviations. It should be using GiB and MiB rather than GB and MB. 

[Tuan]

 

30 minutes ago, Oshino Shinobu said:

It's a difference in units. 

 

Windows is actually reporting in Mebi/Gibi bytes, which is base 2. Mega/Giga bytes are base 10, which is what the drives are advertised in for capacity. 

 

1TB drives will almost always show as 931GB in WIndows. 931 Gibibytes is equal to 1000 Gigabytes.

 

Windows actually uses the wrong abbreviations. It should be using GiB and MiB rather than GB and MB. 

 

31 minutes ago, WereCatf said:

It's normal. Manufacturers like to report their devices' sizes in multiples of 1000 bytes whereas Windows counts it as it should be, ie. in multiples of 1024 bytes, so that's why the disparity.

I appreciate the reply fellas . learned something new today.