That being said, I'll provide a general outline for creating a useful guide. Please feel free to modify it according to your needs:
: If this is a Mega.nz link, it should typically follow the format mega.nz/file/ mega.nz/folder/ 300fotpacksvippormegacomr ar work
followed by a decryption key. The "megacomr" in your string suggests the domain was mangled. Search for "300 Foot Pack" That being said, I'll provide a general outline
