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Storage Management

MIDAS saves projects to your browser's storage. The Storage Management screen lets you view and delete saved projects, and check how much storage is in use.

Open the Storage Management Screen

Click the storage icon in the launcher screen header. The Storage Management screen opens. Click the Back button in the top-left corner to return to the launcher.

View Saved Projects

The summary at the top of the screen shows the total number of saved projects and their combined size.

The table below lists each project by name and file size. Project files are Gzip-compressed when saved, and the displayed size is the actual storage consumption.

Storage Management screen showing project count and total size summary at the top, a project list table in the middle, and the Danger Zone at the bottom

Delete Projects

Deleted projects cannot be recovered. Export important projects as MDS files before deleting. Use File > Export Project... in the project screen. See Getting Started for details.

All delete operations show a confirmation dialog. Full Application Reset requires an additional confirmation step.

Delete a Single Project

Click the X button on the project's row in the project list. A confirmation dialog appears. Click Delete to confirm.

Delete Multiple Projects

  1. Select projects using the checkboxes. Use Select All to select all projects
  2. Click Delete Selected
  3. Click Delete in the confirmation dialog to remove the selected projects

Delete All Projects

Click Clear All Projects to delete all saved projects. Signing keys and settings are not affected.

Danger Zone

The Danger Zone section at the bottom of the screen contains operations that delete data beyond just projects.

Clear All OPFS Data

Deletes all files in the browser's Origin Private File System. This includes project files. Signing keys and settings are stored in IndexedDB and localStorage respectively, and are not affected by this operation.

Full Application Reset

Deletes all MIDAS data: OPFS files, IndexedDB data, and localStorage settings. Requires two-step confirmation.

After reset, MIDAS returns to its initial state as if opened for the first time. Signing keys are also deleted by this operation. Signing keys are used to verify authorship and detect tampering in exported MDS files. Without a backup, you will no longer be able to sign exports with your previous key. See Managing Signing Keys for backup instructions.

Comparison of Delete Operations

OperationProjectsSigning keysSettings
Clear All ProjectsDeletedKeptKept
Clear All OPFS DataDeletedKeptKept
Full Application ResetDeletedDeletedDeleted

Browser Storage Limitations

MIDAS data is stored in browser storage scoped to the app.midas-app.org origin.

  • Capacity: The browser sets a storage quota per origin. The quota varies by browser and available disk space. Check current usage in the Storage Management summary. When the quota is exceeded, saving a project fails with an error. Delete unneeded projects to free up space
  • Data isolation: Other sites and browser profiles cannot access your data
  • Data persistence: Clearing site data for app.midas-app.org in your browser settings deletes all MIDAS data. Clearing only cookies or cache does not affect MIDAS data

See also