128 kilobytes or 128 kilobyte? 128 kBs or 128 kB?
I know that it is 128 Euro and 128 apples. 

I think it is 128 kilobytes, megabytes, gigabytes. Or is it 128 kilobyte, megabyte, gigabyte?

If plural is correct, I should really use 128 kBs, MBs, GBs. That looks unfamiliar. 

Which is correct, plural or singular?

Thanks :)
128 kilobytes or 128 kilobyte? 128 kBs or 128 kB?
===

I know that it is 128 Euro and 128 apples. 

I think it is 128 kilobytes, megabytes, gigabytes. Or is it 128 kilobyte, megabyte, gigabyte?

If plural is correct, I should really use 128 kBs, MBs, GBs. That looks unfamiliar. 

Which is correct, plural or singular?

Thanks :)