Last modified timestamp comes from the browser's File API — it reflects the local filesystem time, not the original creation time on the source system
File creation date is not exposed by the browser's File API on most platforms — only last modified is available
SHA-256 hash is computed by reading the file into memory — files over 500 MB are skipped for hashing to protect browser stability
MIME type shown under "Browser type" is what the OS/browser reports based on extension — it may differ from the actual file content (use File Type Detector for magic byte analysis)
Extension integrity check compares magic bytes against the declared extension — it does not exhaustively identify all formats
Very large files are accepted for basic info (name, size, type), but SHA-256 hashing is skipped over 500 MB to avoid memory errors