If you received this file from an unknown source or via an unexpected link, please be cautious. Archive files like .rar are sometimes used to distribute malware. It is recommended to scan the file with updated antivirus software before opening.
If so, please list some of the files contained inside the archive.
Please share a few more details so I can give you the specific text you're looking for!
If she is an author or professional you are working with, providing her field of work (e.g., photography, writing, law) would help me draft a relevant text.
Because ".rar" files are compressed archives that can contain any type of content, I cannot "write a text" for it without more context. To help you better, could you clarify what you need? For example:
I can help you write a message for sending or receiving this file if you describe the intended recipient.