NAS issue with Lightroom Classic

If you're technically inclined, you could use the invaluable Process Monitor utility to track all file-system accesses by Lightroom. After logging a minute or two of LR running while you hear the disks clicking, do the menu command Tools > File Summary to see which files on the which disks LR might be accessing.

Unfortunately, I don't think this is anything Adobe would investigate unless there were a detailed demonstration of misbehavior by LR (e.g. Process Monitor logs along with a screen recording of LR).

Two additional items to check, bot in LrC preferences. Both unlikely, and would require a map of NAS to drive, but just in case, check.

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Some possibilities:

- You have Face Detection enabled, and LR has decided to index the faces on that drive's photos. Click the identify plate and pause Face Detection:

- You have enabled Catalog Settings > Metadata > Automatically Write Changes Into XMP. There have been many reports in the last many versions of LR needless re-writing XMP back to disk.

- How do you move a project's folder to the NAS?  Do you move it by a) dragging the folder in LR's Folder panel, b) moving the folder with Windows File Explorer and then updating the folder's location in the Folder panel, or c) removing the photos from the catalog, moving the folder, and then reimporting the folder?