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info2x
Participant
May 7, 2025 2:09 AM UTC
Question

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

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?

    6 replies

    dj_paige
    dj_paige
    Legend
    May 7, 2025 11:20 AM UTC

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

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    info2xAuthor
    Participant
    May 7, 2025 11:33 AM UTC

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

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    JohanElzenga
    Community Expert
    JohanElzengaCommunity Expert
    Community Expert
    May 7, 2025 12:18 PM UTC

    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.

     

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    -- Johan W. Elzenga
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