Why is my upload so slow?
Uploads are slow mainly because home and office connections provide far less upload than download speed. Wi-Fi, VPN connections, competing traffic, and large numbers of small files make it noticeably worse.
The main cause
Most connections are asymmetric: a line advertised at 100 Mbps download may offer only 10 Mbps upload. Sending is therefore roughly ten times slower than receiving the same file, and that ratio, not the service, sets the pace.
What to check
| Cause | What to do |
|---|---|
| Wi-Fi instead of cable | Connect by cable for large uploads |
| VPN active | Disconnect it during the transfer if policy allows |
| Video calls running | Wait, calls consume upload bandwidth |
| Cloud sync in background | Pause synchronisation clients |
| Many small files | Combine them into one archive |
| Shared office line | Upload outside peak hours |
| Old router | Restart it, and check the connection speed |
Realistic expectations
Real transfers run somewhat slower because of protocol overhead. If your figures are in this range, nothing is wrong.
| Upload speed | 1 GB | 20 GB |
|---|---|---|
| 10 Mbps | About 15 minutes | About 5 hours |
| 50 Mbps | About 3 minutes | About 1 hour |
| 100 Mbps | About 1.5 minutes | About 30 minutes |
When the service is the factor
Paid MyAirBridge plans include superior upload and download speed, which helps when the local connection is not the bottleneck.
If an upload is dramatically slower than your measured line speed and none of the causes above apply, testing on another network is the quickest way to isolate the problem.
FAQ
Why is uploading slower than downloading?
Consumer and business connections are asymmetric by design, with upload speeds often five to ten times lower than download.
Does Wi-Fi slow uploads down?
Yes, especially at distance from the router or on a busy network. A wired connection is more stable for large uploads.
How can I make a large upload faster?
Use a cable, pause other traffic and synchronisation, archive many small files, and upload outside peak hours on shared lines.
Summary
Slow uploads are usually the connection rather than the service, because upload speed is a fraction of download speed on most lines. Cable instead of Wi-Fi, pausing competing traffic, and archiving small files are the changes that actually help.