Should keep in mind it is a Sata disk without Dram and limited SLC cache. Not good for large transfers but may be for short bursts to read/write data for backup.
For the first twelve minutes and forty-five seconds of writing, the Bolt B75 Pro wrote at a rate of 485 MBps for a total of 375GB. Beyond that, however, write speed decreased significantly. Once the dynamic SLC cache is full, write speed averaged 70 MBps, with lows as low as 5-6 MBps.