If you prefer official updates from the developer (EA Sports), you can update your rosters directly within the game menu: Go to > Edit Teams > Download Updates .
If you have downloaded a Squads.rar file, follow these general steps to apply it to your game:
: Place the squad file directly into this settings folder. Load in Game : Launch the game and go to the Customize or Settings menu. Select Profile > Load Squads . Choose the file you just pasted from the list. Official Alternatives
For more specific guides or the latest community-made roster files, many players visit forums or sites like Scribd or dedicated gaming channels on YouTube . How To Update Squads In FC 26 - Fastest Guide