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File and Data Storage: AFS

Stanford is sunsetting the lightly used WebAFS service for accessing files on AFS on January 7, 2024. Other more modern and secure alternatives will continue to be made available. See this note for additional details. University IT offers full support for the AFS platform, but strongly recommends the use of more modern and broadly adopted file storage services. UIT’s recommendations can be found here .

AFS Class Volumes Will No Longer Expire

January 31, 2024

AFS (Andrew File System) is a distributed, networked file system that enables efficient file sharing between clients and servers. AFS files are accessible via the Web or through file transfer programs such as OpenAFS or Fetch (Macintosh) and SecureFX (Windows).


  • File sharing —  easily and securely share documents and files over the network with colleagues, workgroups, and even other institutions.
  • File backup and restore —  all data is backed up nightly. Backups are kept for 30 days.
  • File access — easily and securely access your files from other computers.
  • File permissions —  use AFS file permissions to provide access to individuals or groups.
  • Websites — store and serve web pages directly and securely.
  • File security —  files are protected by the Kerberos authentication system.
  • Mobile access — a mobile client is available for the iPhone and iPad. The iYFS app is available from the iTunes store for purchase.
  • User volumes provision – a new process for provisioning AFS user volumes, see New Process for Provisioning AFS User Volumes for more information
  • Volume expiration policy – implement user, dept, and group AFS volumes annually renewal process, see AFS Volume Expiration Policy for more information.

Designed for

Current faculty, staff, and students.

AFS storage space is also available for Stanford departments, groups, and courses, and for dedicated research purposes.


A full-service SUNet ID

Data security

This service should only be used for Low and Moderate Risk Data — not High Risk Data — as defined by the Information Security Office. To store High Risk Data on AFS, use the Secure AFS service.


The default quota of AFS storage space is provide free of charge.

If more storage space is needed, charges may apply. See the How to Get More Storage Space web page.

Get started

See AFS for Beginners. Also see File Transfer on the Essential Stanford Software website.

Get help

General support is available through HelpSU.

Learn more

Currently all students with a full-service SUNet ID are granted 5 GB of AFS file space. Additional disk space is available by request for faculty-sponsored research including dissertations. New faculty and staff members are not auto-provisioned with AFS user volumes, but can submit a Help request if personal AFS user volume is needed.

See also

Last modified February 28, 2024