The AS5304T comes with 4 GB but maxes out at 8 GB — a low ceiling

The 4-bay AS5304T ships with 4 GB of DDR4 SO-DIMM RAM, upgradeable to 8 GB via a single slot. For a 4-bay NAS that’s a surprisingly low ceiling — especially if you’re planning to run VMs, Docker containers, or multiple simultaneous file transfers.