Make sure your Internet connection is stable and fast enough. Try restarting your router or switching to a wired connection (if you were using wireless) to reduce signal interference and improve stability.
Avoid large downloads or streaming while uploading files, which can take up bandwidth and slow down upload speeds.
Programs on your computer or phone may be running in the background and taking up network resources. Closing these unnecessary programs, especially those that may be using the network to transfer data, can increase upload speeds.
Avoid peak network times (such as evenings and weekends), when network congestion is higher and may affect upload speeds.