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<blockquote data-quote="nickt" data-source="post: 484293" data-attributes="member: 4923">No. I am assuming you are using your computer normally. Imported pictures are stored on your pc. Occasionally or everytime, you copy the pictures to your external for backup. Ok, that is what I am assuming.&nbsp;So we will ignore the external drive for a minute. To move to a new computer, you want to move your photo folders with structure intact AND catalog to a new computer. That's it. If your external backup is a perfect mirror image, fine, you are ready to move. If your backup has extra photos and not a perfect mirror, you can still use it, but a clean mirror image would go smoother. I like to copy folder tree and catalog on the same day. Of course for my crash, that didn't happen. I had a few dozen extra images on my external as well as the unneeded sidecars. So I had some cleanup to do.To restate the important part: catalog + folder tree is what needs to move. If you do it that way, LR will be very happy.</blockquote>

[QUOTE="nickt, post: 484293, member: 4923"] No. I am assuming you are using your computer normally. Imported pictures are stored on your pc. Occasionally or everytime, you copy the pictures to your external for backup. Ok, that is what I am assuming. So we will ignore the external drive for a minute. To move to a new computer, you want to move your photo folders with structure intact AND catalog to a new computer. That's it. If your external backup is a perfect mirror image, fine, you are ready to move. If your backup has extra photos and not a perfect mirror, you can still use it, but a clean mirror image would go smoother. I like to copy folder tree and catalog on the same day. Of course for my crash, that didn't happen. I had a few dozen extra images on my external as well as the unneeded sidecars. So I had some cleanup to do. To restate the important part: catalog + folder tree is what needs to move. If you do it that way, LR will be very happy. [/QUOTE]

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