Extremely slow "folder move" with Lightroom Classic 15.1

Question

Recently Lightroom seems to stall or deadlock when moving folders between my Laptop's SSD and NAS (over SMB). Here's a screenshot of network activity.  On the left, Lightroom is moving a large folder at a rate of 1 image per minute.  It copies the file quickly, then stalls - apparently no activity.  On the right, I gave up and just moved the folder using macOS Finder - it maxed out the NAS's write speed over 10Gbe ethernet. I've tried restarting Lightroom, and I've paused all background tasks (Cloud sync, Assisted Culling, Address Lookup, Face Detection, Saving XMP metadata). Lightroom Classic 15.1, macOS Tahoe 26.3, M4 Max, 10Gbe ethernet, Synology DSM 7.3.2.  The catalog has about 280k images in total, about 60k synced to Cloud.$> smbutil statshares -a | grep SMB_VERSION
                              SMB_VERSION                   SMB_3.1.1

dj_paige · Answer

What happens if you do the move using your operating system and then re-connect inside of LrC following these instructions? Is that faster? It should be.

At that link, the suggestion is to first COPY (not move) the photos in your operating system (scroll down to "Part 2 — Updating Folder Location"), re-connect, and then once everything looks correct inside of LrC, then use your operating system to delete the photos at their original location.

As an additional suggestion, why not just put the photos on the NAS straight out of the camera from now on, eliminating the need to do a move?

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