Having a problem opening my lightroom catalog on my portable drive. The drive is brand new, udloaded all my images to it from another drive and it was fine. The last time I uploaded photos to this new drive it started uploading very slow, took much longer then it should have to upload not that many images. After the upload was done, i tried to start editing and either the drive or lightroom loacked up. I couldnt even eject the drive from my mac. I had to unplug it without ejecting. Now when I try to open the catalog on the portable drive it says the catalog is being used my another application and connot open. I get this message when I try to open it from my mac and pc. What do I do?

Run disk utilty, maybe reformat.

Then ill have to reload all the images though right?

Originally Posted by QuadRacer041 Then ill have to reload all the images though right?

Yes. Hopefully you have a back up on another drive. Otherwise clone (backup) everting on this suspect drive first. Hopefully the data is OK.

Data isn't data unless it exists in at least 3 locations, one of which is offsite. Learn and live this mantra! (I almost learned this the very hard way.

So you have your data, your backup (external harddrive), and your offsite location. (I use crashplan. THere are other services.)

my guess its the drive itself

is it visible in My Computer ?
if so , right-click it / properties / tools-tap / check for errors