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Previews folder filling my C Drive

Joined
Feb 14, 2018
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Lightroom version: 4.1 x64 [ 20201120-1311-17d302b ] (Nov 23 2020)
Operating System
  1. Windows 10
My C drive keeps filling up with Lightroom files, specifically Previews and Proxies. My C drive is only 256G, and I keep all my files, including LR originals on D. However the foder C:\Users\ALIENWARE\AppData\Local\Adobe\Lightroom CC\Data is currently 90GB
I have set my preferences to NOT store a copy of all smart previews on "C".
Is there a way to move those files to another drive? They are making my computer almost unusable. There is nothing else I can delete from C!
 
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The only non-technical way to keep the previews file on another volume is to store the catalog itself on another volume, because Lightroom Classic always puts the previews in the same folder as their catalog.

For a small internal drive, one strategy is to periodically delete the previews, because they’ll be re-created as needed and you lose nothing (except maybe the speed advantage of being able to use previews that have already been generated). But they will grow again as you browse images, since you need previews to be able to browse in the Library module.

Another option is to go into Catalog Settings and reduce the size or quality of the previews, and maybe set 1:1 previews to be automatically discarded more frequently. But that doesn't limit how much they can grow, only how quickly. And note that the Auto standard preview size can be much higher on 4K+/Retina/HiDPI displays than for lower resolution displays, so if you have a higher resolution display, consider using a lower Standard Preview Setting size than Auto.

View attachment 15844

By the way that screen shot is for my test catalog, so the previews aren’t taking up much space. The previews for my master catalog are over 27GB…might be time for me to toss them again…
Thank you. I appreciate your detailed reply. However this is the Mobile Desktop version, not Classic.
 
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Can you post a screenshot of the Preferences>Local Storage tab? We might be able to suggest the optimum settings to better manage the space needed on the C drive.
 
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Hi Conrad
That doesn't help, this is the Cloud version, not Classic.
Thank you. I appreciate your detailed reply. However this is the Mobile Desktop version, not Classic.
Oops, sorry! I read this from the New Posts list and should have taken a closer look at the forum it was in.
I’ll edit my post so as not to mislead others who might read this thread.
 
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How many images do you have stored in the cloud? You could reduce the Photo Cache size down to 0% as you have a local copy of the originals on the "SSD DRIVE" (which is presumably the D drive), but that'll only free up 13GB.
 
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How many images do you have stored in the cloud? You could reduce the Photo Cache size down to 0% as you have a local copy of the originals on the "SSD DRIVE" (which is presumably the D drive), but that'll only free up 13GB.
I have close to 150,000 images.

I have deleted the previews folder, which has freed up about 40GB, for now. Of course there's a new Previews folder, but it is much smaller and I assume it will take a while to get to that size again. Is it also safe to delete the Proxies folder?

Thank you for your help.
 
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My C drive is also 256 GB and my Cloud photographs are stored on my D drive, a 4 TB hard drive. Assuming your D drive is a hard drive, I find it strange that you reference it as "SSD DRIVE". Is there some error within your system messing up your drive references? My options are much like yours.

1610481867149.png
 
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On further thought, I have 80,000+ images taking up 1.46 TB. My earlier comment may be "barking up the wrong tree". My C:\Users\charl\AppData\Local\Adobe\Lightroom CC directory is only 20.9 GB with slightly over 202,000 files in 7,800 folders.

Now that I'm delving into this, what I see appears to be similar to the LR Classic catalog in structure. My C:\Users\charl\AppData\Local\Adobe\Lightroom CC\Data\7d52eb24dea9406cad05d63bfe0d4b03\previews directory is 8.2 GB and 113,000 files; and my C:\Users\charl\AppData\Local\Adobe\Lightroom CC\Data\7d52eb24dea9406cad05d63bfe0d4b03\proxies\2560 directory is 9.0 GB and 7,700 files. I don't know how Adobe uses those directories and their files; but I wasn't happy with the structure of the Classic catalog, and I don't terribly like what I see here.

I am not having your problems, but I have not been using LR CC very heavily recently. Since we don't know how Adobe uses the data in these directories, I guess we just have to have faith in what they are doing. You may want to look at these directories, their size and contents. You problems may lie in settings or usages which affect the contents of these directories.
 
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