Apps · Moving apps to your fast drive
Why does Storage Studio ask to turn off Spotlight on my fast drive before moving an app?
Short answer: Spotlight indexing competes with the copy and can make app moves much slower. Storage Studio can switch indexing off for the fast drive only; the rest of your Mac stays searchable.
Because Spotlight scans every file written to a drive it's indexing, and apps are made of thousands of small files — so indexing competes with the copy and can make a quick move drag on.
If you agree, Storage Studio turns off Spotlight indexing for that drive only; the rest of your Mac stays fully searchable, and moved apps still appear in Spotlight through their shortcut. macOS asks for your administrator password, which is the standard system prompt. You can also choose to proceed without disabling it — the move just takes longer.