Working on a WordPress multisite installation, I’m digging into the database structure and have hit a snag: I can’t pinpoint where WordPress stores the “File URL:” that appears in the Media Library for each upload. This is purely a database question—no plugins are influencing media handling and I haven’t altered the schema or data in any way. I simply want to know the exact table and column (or any related serialized field) that holds the URL string, plus a brief explanation of how WordPress retrieves and displays it across sites in a multisite network. A concise answer or short code snippet that demonstrates the lookup is all I need.