What if you try reboot it?
Maybe this can fix an unknown error so that the volume can be created.
You can also send an email to the technical support mailbox, so that we can better analyze the problem.
Drives used in TNAS need to be formatted, create new partitions and a new file system, so you should backup all your data before you use the drive for TNAS. By the way, before you install, please refer to the hard disk compatibility list.
So, what happened after you reinstalled the system. Generally speaking, the damage to TOS is basically caused by file system damage, hard disk problems, power failure, etc. If this happens again or even repeatedly in the future, please carefully consider the cause of the failure.
TNAS.online is a free remote service that does not offer very large bandwidth, the access speed may be slower when more users visits.
But DDNS is another story, you need to check if your DDNS configuration and router setting are correct.
Hello, this result is lower than the speed of this type of hard disk, maybe there is a bad HHD in RAID1 that affects the speed. You are advised to back up your data and test each one in Single mode. If possible, please also install the HHDs on another device to test.