Thanks for the feedback thus far. To clarify. I'm only moving my work folders for each show (i'm a concert photographer) off the laptop as i'm running out of space on my 1 TB SS drive. So i'm not working off the external drive, it's purely for storage after i'm done editing/exporting. I'm a paid subscriber to CC so i do have the latest 🙂 version of Classic, Photoshop, etc. (Release 7.5 and Camera Raw 10.5). I only have around 30gb of space left on my 1TB internal SS drive. As i only shoot in raw, that fills up quickly so i offload the folders once i'm done. (as mentioned above). My editing is pretty standard, with the basic tool adjustments, the adjustment brush, Crop tool, etc. But, for example this morning, I would click the adjustment brush, and then go to click on the picture and the mac beach ball would show up for a few seconds. Then if i move a slider or something, you would see a very noticable lag before you would see the shift. Normally, it's instantaneously. I only have my mac mail, a Chrome Browser and messenger running in the background. Sometimes i'll have PS open too but that doesn't seem to matter whether it's open or not. Thanks for further guidance. I have not had a chance to try the suggestion the first poster made yet. Stevo
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