I have installed five of these discs in my DS1522plus. No problems. Super disc. I assume that this drive should also have no problems in the 23 Synology.

I have installed the disc in the DS923+ and it runs without any problems. I think it will also run in the DS723+.

I have been using this hard drive continuously in my DS218+ since the beginning of the year. No problems so far. Whether DS723+ or DS218+ should not matter.