Lightroom Classic: Add the ability to unzip catalogs larger than 4gb (without the use of a 3rd party utility)

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  • Updated 7 months ago
  • (Edited)

What program/utility does Adobe recommend for unzipping compressed LR 7.2 backups. Some people are having problems doing this. Not all unzip utilites are compatible. So Adobe ought to recommend one that is compatible.


Bob Frost

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Robert Frost

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Posted 7 months ago

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Rick Spaulding, Champion

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You don't need anything fancy. It's built in to the operating system.

If you are using Windows:

https://support.microsoft.com/en-us/help/4028088/windows-zip-and-unzip-files

If you use a Mac:

http://www.dummies.com/computers/macs/how-to-zip-and-unzip-files-on-your-mac/
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Johan Elzenga, Champion

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Rick,
There have been issues with the built-in options in MacOS X. In fact, there was a bug in one version of Lightroom 6, where users were warned not to use the MacOS X utility, because their catalog was bigger than 4 GB (the bug was that you also got this warning when your catalog was much smaller than that). Is that all in the past now? Does Adobe recommend the MacOS X utility, even for larger than 4 GB catalogs?
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Rick Spaulding, Champion

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Thanks, Johan! I'll check into that and get back to you.
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Robert Frost

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Hi Rick, If that was true, we wouldn't be having problems! I've just tried opening a LR 7.2 backup with  the builtin Windows explorer unzip, and it does not work - it says

Windows cannot complete the extraction

The destination file could not be created.


I can usually open them with my 3rd party file manager - Directory Opus, which is why I have never had this problem. But using Windows unzipper, I can see why others are complaining. We need to know from Adobe what unzippers are 100% compatible with their built-in zipper, or they ought to provide a built-in unzipper.

Bob Frost


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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Robert Frost

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Hi Jeffrey, what about windows users who can't open LR backups? It would be best if you provided a built-in unzipper to match your built-in zipper. Can't take much work to just run your zipper backwards, can it? (; Bob F.
(Edited)
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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That's a great suggestion. If that's what you're asking for, I will change this to a request and run it by the team.
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Victoria Bampton - Lightroom Queen, Champion

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Bob, I've been using the free Stuffit Expander with great success.
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Robert Frost

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Thanks Victoria, but I don't have a problem using my Directory Opus file manager which unzips LR backups without any problem, but I can confirm others reports that the builtin Windows unzipper doesn't always work. But if Jeffrey can get the team to add 'Open a Backup' to the menu next to 'Open a Catalog' that would solve all the problems!

Bob F.