I have a Windows 10 laptop with Lightroom (CC) installed. I've imported about 20,000 photos and they have all uploaded to the cloud. In Edit > Preferences > Local storage I checked the "Store a copy of all originals at the specified location". I did not check the "Store a copy of all Smart previews on C:" I set the cache size to 50% of free space. It shows about 250Gb required space. I did all this at least three months ago. Cloud storage says "Synced and backed up" and shows about 219Gb used.
1) I want to backup my originals and other information (catalog?) to an external drive. When I look at the "Storage location for originals:" and click the Browse button it opens a folder at the specified location: "C:\Users\[MyName]\AppData\Local\Adobe\Lightroom CC\Data". But if I open Windows File Explorer and browse to that location there is no Lightroom CC folder. (I have "Show hidden folders" and "Show system files" turned on in File Explorer.) If I try to find it by copying and pasting the path from Lightroom to File Explorer I get an error saying it can't find it. After a lot of looking I think I found it in C:\Users\[MyName]\AppData\Local\Packages\Ad0beSystemsIncorporated.AdobeLightroom_ynb6jyjzte8ga\LocalCache\Local\Adobe\Lightroom CC . (I had to put a "0" in the path because the forum editor won't allow "Ad0beSystems" in the body text with a "o" for whatever reason.) The size of the folder matches the size shown in Lightroom Preferences; 250Gb. Is this path confusion something caused by Windows 10 voodoo? Is Adobe intentionally hiding the location? It does not give me a good feeling about knowing where my stuff is all the time for backup purposes.
2) Will I get any performance improvement by moving the originals location to somewhere with a shorter path? Assuming it will really move the photos.
3) Will I get better performance if I turn on "Store a copy of all Smart previews on C:" even though I have the originals local?
4) When I am in Lightroom scrolling through the photos in Detail view using the track pad it will stall for awhile and usually skip photos, this seems to be worse with raw photos. If I scroll to a video it will stop scrolling completely with the track pad. The arrow buttons and mouse wheel work ok. I don't have a problem with the track pad in any other situation, only Lightroom. Editing is responsive and quick enough but just browsing through the photos is a pain.