Fixed in 7.16beta3 (2024-Jun-27 08:33):
*) chr - fixed incorrect disk size for ARM64;
[admin@MikroTik] > system/resource/print
uptime: 36s
version: 7.16beta3 (testing)
build-time: 2024-06-27 05:33:05
free-memory: 3633.8MiB
total-memory: 4000.0MiB
cpu: ARM64
cpu-count: 2
cpu-load: 0%
free-hdd-space: 36.4GiB
total-hdd-space: 36.4GiB
write-sect-since-reboot: 3442553
write-sect-total: 3442553
architecture-name: arm64
board-name: CHR Hetzner vServer
platform: MikroTik