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Backup To Dropbox and Smart Previews


New Member
May 11, 2020
Lightroom Version
Operating System
Windows 10
Thanks to @Jim Wilde and @ Philippe Coudé du Foresto I have now set up my first decent Catalogue on a new NVMe 2TB file. I've now introduced 23 folders now of various photos and videos (I decided to keep videos in the same folders as the photos taken on the same occasion) and have now got a Catalogue containing over 8,600 files. The files total almost 200GB. If I may could I ask a couple of further questions please? : -

1. I'm now thinking of my Backup stratedgy. I have a 2TB Dropbox Pro account and have got a further 1TB of photos and videos to add the the Catalogue once I'm sure I've got things set up correctly. Having a 1-2-3 Backup Stratedgy is too expensive for me in terms of file space so I'm thinking of having my "Dropbox" folder moved to where my files and folders are and move the latter into it and syncing from there. I don't know whether to move my Catalogue folders there too. Can someone tell me with this stratedgy would it slow down working in Lightroom, should I turn off Dropbox Sync whilst working in Lighroom itself and where exactly ought my Catalogue folders be situated?

2. The Previews.lrcat folder is currently 45GB, which seems large in relation to the total size of corresponding files. Currently the Previews and Catalogue folders and files are on a separate SSD. I appreciate this is probably due to invoking Smart Previews. If I turn Smart Previews off, exactly what functionality will I lose?

Thanks again in anticipation