Editing Personal Data Server (PDS) (section)

=== Blob Storage ===
Beyond text-based content, PDSes host and manages [[Blob|blobs]] - binary media files like images, videos, and other media files shared by users. They validate the content type of uploaded blobs, store them securely, and serve them publicly. Some implementations also detect sensitive metadata in blobs (like EXIF location data) and prevent upload unless explicitly overriden by the client.

PDSes track repository references to blobs and enforces restrictions on size and type. They manage the blob lifecycle by expiring never-referenced blobs and deleting blobs after their last referencing record is deleted. For moderation purposes, it also provides mechanisms to purge individual blobs from an account.