How long does it take to copy 50 GB over WiFi 5? Real-world signal interference

How this is calculated

Close to the router on a clean channel, WiFi 5 can push 600-800 Mbps briefly. Through a wall or at range, 200 Mbps is more realistic, doubling the transfer time to ~34 minutes. That's why large transfers over WiFi feel inconsistent. The link rate changes moment to moment. If consistency matters, wired Gigabit at ~110 MB/s sustained is a cleaner choice for large transfers even in a WiFi-first home.

Verdict

50 GB at WiFi 5's realistic 400 Mbps sustained rate on a good 5 GHz 80 MHz link works out to 16 minutes 40 seconds. 802.11ac's marketing peak of 1.3 Gbps assumes lab conditions that don't survive a few meters of distance and a wall or two. In typical home conditions the 400-500 Mbps sustained figure is what you actually see, and the verdict's variance band of 25-33 minutes at 1.5-2x the headline captures the wall-and-distance penalty realistic deployments hit. Wired still wins for predictable transfer time because 802.11ac's per-frame retries and channel contention under congestion erode the sustained rate fast enough that you can't plan against the marketing peak, whereas plugging in Cat6 Gigabit Ethernet gives you the 13m 20s for 100 GB floor that's reliable to plan against rather than estimate.