Freeing up space · Storage Profile, charts and Home
What do the "Data transferred OUT" and "IN" charts show?
Short answer: They show, for the last 30 days, how much data left your built-in drive (OUT) and came back to it (IN) each day, stacked by service — fast drive or cloud account.
They show, day by day for the last 30 days, how much data Storage Studio moved off your built-in drive (OUT — to your fast drive or a cloud account) and how much came back to it (IN), stacked by service so you can see where each day's activity went.
They answer two different questions: what's been leaving your startup disk this month, and what's been returning to it. Alongside them you'll find a used-versus-free view of the latest reading and the top folders from today's measurement. See What do the storage charts show?