Two quick thoughts even if you are resolved:

First, are you still running BIAB 2019? Version 2024 dramatically improved the time required for file regeneration, something you mentioned.

Second, is your external USB drive a SSD? That would also help.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.