I get an average of 20MB / s write and 35MB / s read on a USB2 port (not tested USB3).
I did some comparisons of access speeds with the format FAT32 (original) and NTFS:
- NTFS with the default cluster 4K, it is slower (17MB / s - 32MB / s)
- NTFS with a cluster of 64K is barely better than FAT32
Note: Measured values with Atto Disk Benchmark v2.46
Edict of March 2015:
I am surprised to discover only now as many negative reviews for this key.
After more than 3 years, mine still works well, while I used it several times a day on different machines ...