I was editing an image in Lightroom, and needed to do some quick clean up. So I used the "import to Photoshop" feature in order to do this. I made one copy of the file, and then a new layer. I used various heal tools on the new layer. Nothing exotic on the healing, just removing dust spots. When done with the healing, I made a consolidated stamp layer (al+ctrl+shift+E). I then closed the document to import back into Lightroom. I sat and waited for the image to upload to the cloud so I could edit it. After 2 hours, it still hadn't uploaded. So I just left my computer on and went home. Several hours later, it finally updated. At home, I tried to finish the editing the image in Lightroom mobile, and then export. After pressing the export button, I again waited over 2 hours for the image to download so it could be exported. I simply gave up after 2.5 hours, and just made the changes in Lightroom.
I am now looking at the file in my Lightroom library, and it is 1.15gb. This is massive. The file is saved as a .tif, and I thought that when Photoshop exported the file, it flattened the image into one singular image. This seems to be true, as pressing "edit in photoshop" on that same file opens it as a single image again in Photoshop with all the changes that were previously made saved, and no layers to edit. So if it isn't saving the layers, why is the image so large?
My file dimensions are 6720x4480 (240ppi). The entire Photoshop image was 4 layers, with one of them being a clear new layer used for healing. Photoshop and Lightroom are the latest versions. If I flatten the image in Photoshop, it drops it down to 175mb. Still large, but far more managaeable. I haven't tried uploading this image, as I don't have 4 hours to wait on the file to upload. This seems like a massive bug, as saving just a few of these images would rapidly take up all of my storage. Not to mention that several hours to upload and download 1.15gb from the cloud is a bit crazy. I used my work computer and wifi to upload, and then my phone on my home wifi to download. Both internet services are running at normal wifi speeds.