Use the command 7z l beach22.7z (the letter "l" stands for list). This will print a list of all files, their original sizes, and their compressed sizes.
Since the specific contents of your individual file are not part of a public or widely known dataset, "looking at" it typically involves one of the following actions: How to View the Contents beach22.7z
High-resolution images (JPEGs, RAW files) or video clips from a 2022 beach trip. Use the command 7z l beach22
