Upload speeds extremely slow / stalling since April 1st

Possibly bug of Windows?

This likely matches huggingface_hub issue #3871 and PR #3912. It does not look like a new April 1 outage. The pattern matches a Windows multipart upload bug for files with new data over ~2 GB. HF_HUB_ENABLE_HF_TRANSFER is deprecated now, so toggling it is not informative. The best workaround for now is trying the upload from WSL/Linux/macOS, and using the official HF_HUB_DISABLE_XET=1 flag for a clean non-Xet test. Uploads with New Data Upload over 2GB get stuck in Windows 11 with Python 3.12 · Issue #3871 · huggingface/huggingface_hub · GitHub