Brand new ATL LTE18 disk space problem???

I have a new ATL LTE18 kit (ATLGM&EG18-EA) that I have updated from 7.6 to 7.9 and added ZeroTier package.
It works great but I have just realized the device has only 16 MB of HDD space (I mean, seriously? Are we in 1990s?).

The resources now show that I got 0.5 MB left. Unfortunately, I do not know what was the initial size.
After few reboots it appears to be stable at 576 KiB (at least for now).
Is it something I should worry about? Is there any risk that it will reach 0 and brick?
disk space.png

Netinstall 7.9 and zerotier at the same time for completely clear the space and do not leave update files internally inplace on temporary folder.

Same issue with all outdoor LTE products launched so far. I hope MikroTik provides more storage to future products.