How can I change lightroom 5 previews smart on the book of mac pro (mbp) when lightroom master image files 5 are on my external hard drive is disconnected from the mbp

How can I change lightroom 5 previews smart on the book of mac pro (mbp) when lightroom master image files 5 are on my external hard drive is disconnected from the mbp? So far when I try to disconnect the external hard drive the mbp, I get the pop following window: "external hard drive A" disc could not be ejected because it uses 'Lightroom '. Exit this application and try out this disc again. When I do that and restart Lightroom 5, Adobe Photoshop Lightroom - screen select catalog appears, but does not list my external hard drive A as a choice.

I've been reviewing Adobe's Lightroom Help | Smart web page Previews Lightroom 5 and still have not been able to understand what I am doing wrong. Any help would be appreciated.

HI Thomas,

Thank you very much for your suggestions! They finally gave me the direction I go solve the problems I had. Basically, the Mac Book Pro based Lightroom irdata files still had thumbnails. Once I removed the and redirected Lightroom external hard disk, smart previews of the external drive work when the player is well off the MBP. Much obliged.

I was wondering if you have any suggestions on how to backup all the files content and related data of Lightroom that exists on the external hard drive to another external hard drive as a backup? Ideally, it would be great if I could be able to launch security HD since the Mac Book Pro and do the work of Lightroom with the backup image files and intelligent previews correctly. Thanks again. Your help has been invaluable.

Tags: Photoshop Lightroom

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