Storage optimized for fast, frequent access — data you might need to restore today.
Hot storage is the tier of cloud storage optimized for low-latency, frequent access — the opposite of archival tiers where you pay less but wait longer to retrieve.
In cloud storage pricing, every provider offers a spectrum. At the hot end, reads return in tens of milliseconds, there are no retrieval fees, and you can list, download, or delete any object on demand. At the cold end (think AWS S3 Glacier Deep Archive), the same byte costs a fraction per month to store but takes hours to thaw and charges you again to read it. Hot storage is where active backups belong: the Lightroom catalog you edited yesterday, the Final Cut library from last week’s shoot, the snapshot you might need to restore at 4pm because you deleted the wrong folder at 3:45pm.
The tradeoff is price per gigabyte. Hot storage typically runs several times more expensive per month than archival tiers, which is why archival makes sense for a 3-year-old photo library you retrieve twice a year and hot storage makes sense for a backup set you restore from in an actual emergency.
In macup, your macup Cloud destination is hot storage by design. When you hit restore on a file that was backed up ten minutes ago or ten months ago, the bytes start streaming immediately — no thaw window, no retrieval surcharge, no ticket-the-support-team workflow between you and the photo you need back.