Me_sisters.7z

this file if it came from an untrusted source, such as an unknown email attachment, a suspicious website, or a peer-to-peer file-sharing network.

Files with the extension are compressed archives (similar to .zip files). Because they can contain any type of file, they are often used to distribute malicious software. ME_sisters.7z

to ensure it is safe and intended for you. this file if it came from an untrusted

If you can tell me or what you expected it to contain (e.g., a game mod, a picture set), I can provide more specific safety advice. such as an unknown email attachment