Like standard 7z files, split archives support AES-256 encryption , allowing you to password-protect the data across all volumes.
The .7z format uses LZMA/LZMA2 compression , which often results in significantly smaller files than standard ZIP or RAR. AaS.7z.001
The file extension signifies that a large archive has been split into multiple smaller parts, with ".001" being the first volume. This is an "interesting feature" because it allows you to bypass file size limits for email attachments or cloud storage while maintaining high compression. Key Features of Split Archives Like standard 7z files, split archives support AES-256