Photo import transfer speed is slow (50 MB/s)

Forum|Forum|10 months ago
May 7, 2025
1 reply
492 views

Not sure what's going on here. I've never found LrC to be super fast with how it handles importing photos but it's gotten a lot worse lately. While playing around with an import tonight I was getting 50 MB/s for the transfer speed. Taking the same folders and importing them with windows explorer: >600 MB/s.

I can't seem to find what I've done for this to happen.

CF Express cards via thunderbolt card reader, Windows 10, LrC 14.3. Here's the kicker. I'm not sure this is just a LrC issue. I tried using Photo Mechanic and am getting similar speeds.

Thoughts?

Windows

dj_paige

Legend

Perhaps your card reader is malfunctioning? Perhaps the camera card is malfunctioning?

I

info2xAuthor

Participant

I've tried with different cards and readers. Also wouldn't explain why explorer is still quick.

JohanElzenga

Community Expert

How exactly did you measure this? Importing images in Lightroom Classic is more than just copying them. Lightroom Classic will also generate previews (unless you use 'Embedded & sidecar') and you may have inadvertently checked the option to make a secondary copy as well.

-- Johan W. Elzenga

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