Is it safe to store a NAS with installed HDDs?

Hey all,

I recently got a Synology DS923+ for someone as a gift, and installed the drives/ran initial setup so that it will be good to go when they open it.

My question is - is it safe to repackage the unit in the box that it arrived in now that the drives are installed? It is almost all cardboard while the NAS itself came wrapped in a light cloth material

I don't see why it wouldn't be , but I wanted to make sure before I bricked some 20 TB drives

Thank you in advance!