Because 7z files can contain any data, including software or potentially harmful scripts, you should always verify the source before extracting it.
Install an app like iZip or 7Zipper to extract the contents on your phone or tablet. Security Warning: Avoid Malware holiday.7z
7 Easy Ways to Open 7z Files: WinZip, 7-Zip, & More - wikiHow Because 7z files can contain any data, including
