Don't trust what the user says they are uploading. You need to check the "exclusive" nature of the file itself. Whitelist Extensions : Only allow specific formats (e.g.,

: Katsem is a social media personality known for lifestyle videos, often tagged with #fyp and #malaysiafyp.

: Allow users to tag an upload with a "purpose" (e.g., avatar, document, attachment). This lets the service apply different retention policies to each "bucket".

: Save files in a directory that is not directly accessible via a URL. Use a dedicated script or a storage bucket (like AWS S3) to serve the files back to users. Scan for Malware