Im trying to find out what "build preview" does Lightroom CC create. So when syncing to Lightroom Classic CC what quality preview do i get? I like to Import mine as 1:1 when importing from an SD card to Lightroom Classic CC. Thanks.
If you have the preference set to Auto, in the file handling tab, in catalog settings the LR Classic will build a preview appropriate for the size of your monitor. After downloading originals from the cloud is complete, you can select all and generate 1:1 previews.
Each application uses its own previews.