RAM Folder configuration

The New RAM folder sheet settles the basics when a disk is created — folder, size, and name. Everything else about how a disk behaves lives in its Detail View: select the disk in the sidebar and its options open on the right. These are the Normal options; the rarely-needed Advanced settings are covered in Advanced options.

Capacity

The size you set in the sheet is a ceiling, not a reservation: the disk grows with usage up to that number. It is also not permanent — the Capacity control in the Detail View raises or lowers it at any time. Growing, or shrinking while the content still fits, preserves content; shrinking below the space in use warns you and erases the disk if confirmed. See Memory & sizing for limits and the Memory Gauge.

Name

The optional name from the sheet labels the disk in the app. A disk without a custom name displays its folder’s name, so renaming the folder renames the disk. Names must be unique across your RAM folders, case-insensitively — the app refuses a duplicate on Apply.

Sync RAM folder

The single most important switch, because it decides whether your work survives ejecting the disk. RAM is volatile: when a disk is unmounted, everything in it is gone unless it was saved back to the backing folder first.

Sync RAM folder — on (default): when you eject the disk (or quit the app, or shut down cleanly), RAM Folder copies its contents back to the backing folder on your SSD, so the work is there the next time you mount. Unmounting from Finder or diskutil is handled too — just don’t use Force eject.
Sync RAM folder — off: the disk is pure scratch. Everything written after mount is discarded on unmount. This is what you want for throwaway build caches or temp files where saving would only waste time and SSD writes.

If a disk holds anything you care about, leave “Sync RAM folder” enabled. Even then, a save only runs at unmount — a power cut or kernel panic while the disk is mounted writes nothing. To narrow that window, keep Save RAM folder periodically on (below), and read Data safety for exactly what survives a crash.

Save RAM folder periodically

Save RAM folder periodically keeps an on-disk snapshot refreshed while the disk is mounted (default every 15 minutes, and you can pick the interval). So an unexpected forced unmount loses at most the work since the last snapshot. The mechanics are explained in Synchronization and Data safety.

Mount at launch

Mounts this disk automatically when the app starts. Combine it with Open at Login to have your disks ready every time you log in. In menu-bar mode this is invisible — no window opens; the disks are simply mounted by the time you look for them.

Keeps the disk out of /Volumes, the Desktop, and the Finder sidebar under System Integration. It stays fully accessible at its mount path; this only affects where it shows up. Takes effect on the next mount.

Applying changes

The Discard / Apply pair at the bottom-right of the Detail View commits or drops any change you make. Apply commits the edits; Discard throws them away. Changing an option never touches the disk’s contents — a resize excepted, as noted under Capacity.