Everything was fine in my indesign project and i sent it home from my desktop at work so i can work on it at home from my laptop. All my Jpgs went blurry! these are huge images that i downloaded from Unsplash. Sent it back to my Desktop and still the same issue. It's in High Quality Display and still looks pixelated.
Make certain the image links are still valid. Especially if you are moving the INDD file back and forth between workstations. Broken image links will use low resolution previews.
Basicly what Scott is saying. Bring up the Links panel via Ctrl+Shift+D and if you see any question mark icons up there, that means missing or broken links, which will result in your images defaulting to a low res preview.
When you move projects around, make sure the entire 'Links' and 'Document fonts' folders are included for a working package.