Here's why I'm trying to ask. Lately I have downloaded a lot of files from Google Drive, and I'm trying to sort a lot of documents (262 exactly) by finding a set of numbers and letters that only one kind of document has. For example, I'm trying to find the documents that have "5R-ET1" to see which documents has those set of letters inside the documents to sort them in a diffrent folder. Is there something in the Finder that can allow me to do this, or is there like this program which compares documents that fits my use? By the way, most of the files are in .doc format, the rest are in .pages format. Hope there is a way to fix this situation!