Use the TEXTJOIN or CONCAT functions to merge strings from different cells.
If you only have a few files, you can use a standard text editor: 55744.rar
Example: =TEXTJOIN(" ", TRUE, A1, B1) will combine cells A1 and B1 with a space between them. Use the TEXTJOIN or CONCAT functions to merge
If using PowerShell, type cmd and press to switch to the Command Prompt. Type the following command: copy *.txt merged.txt 55744.rar
Open the and navigate to your extracted folder using the cd command. Use the cat (concatenate) command: cat *.txt > merged.txt