Fake micro SD cards

Hi all

I recently purcased a Sandisk Extreme Pro 280MB/s SD Card from a reputable Sandisk Reseller & got the following results using H2testw v1.4:

Warning: Only 60317 of 60318 MByte tested.

Test finished without errors.

Writing speed: 34.1 MByte/s

Reading speed: 35.9 MByte/s

Am I getting my MB/s & MByte/s symbols mixed up?

The reason I tested is because I used it in my BMPCC & got drop frames.

Thanks

Pete