the text file(s) you want to include in Windows Explorer.
To create a (specifically named p611.7z in your example) containing a text file, you can use the 7-Zip command-line tool, which is ideal for this task. p611.7z
A "solid" archive treats all files as one single data block, which significantly improves compression ratios for similar files [1]. Using Command Line (7-Zip) the text file(s) you want to include in Windows Explorer