I used the benchmark function on the synology storage manager and got the results shown in the last picture, mainly the following: read 243MB/s throughput with 12.0 ms latency and 237 IOPS, and for write 283 IOPS, 242 MB/s throughput and 3.6 ms latency. When the datasheet from Seagate for a 10 TB HD shows 214MB/s and 4.16 average latency.
I've been happy with the performance, you have the option of getting up to 14 TB in this ironwolf pro Nas version however I chose not to use the highest capacity trying to prevent a larger loss of information on case of a failure. Obviously there are several drives but I prefer having less info loss vs higher capacity. It just depends on what you save on your drives. These I highly recommend both for Nas or the faster ssd drives for cache and operating system.