If a file is too large to transfer, it can be split into smaller segments (e.g., .7z.001 , .7z.002 ). 7z vs. ZIP: Which is Better? ZIP Format Compression Ratio High (LZMA/LZMA2) Moderate (Deflate) Compatibility Requires specific software Native support on most OS Security Consistently strong (AES-256) Varies by software Speed Slower (more CPU intensive) Does 7z compress better than zip? - Microsoft Community Hub
appears to be a compressed archive file (likely containing "Technical Previews" or "Time Capsule Previews") created using the 7-Zip utility.
It supports AES-256 encryption , allowing you to password-protect both the file contents and the filenames (metadata).
These multi-format tools also support extracting .7z archives. Steps to extract: Right-click the TcPrevs.7z file. Hover over the 7-Zip menu option.
