To speed up saves during manual 3D model fixing, simplify your scene, use incremental saving, and save to fast storage.
Simplify by hiding unused layers, deleting temporary geometry (like test meshes or duplicates), or using proxies for high-poly parts—this reduces the data your software processes. Incremental saving (e.g., Model_v01, Model_v02) saves faster because it only adds changes, plus it avoids overwriting your main file.
For large models, use an SSD—its fast read/write speeds cut down save time for complex files.