If you can't find files, are you saying they're disappearing? I'm having a hard time understanding what the problem has to do with Drive specifically.
If people just forgot where they put something, it seems like you need to develop and practice some organization. I work with lots of clients and use Drive and organize things into folders named for each client, and then into separate categories based on what the file is. It's relatively easy to find things.
If I happen to forget, then I've found the search works well. I use the cloudsearch page at cloudsearch.google.com
I consider myself a technical person, but opening the files on Drive is always stressful for me (fortunately I don't need to do it often). The navigation sucks (I don't see the files that I know are there), the search is the only thing that works - if I know what to search for. I wonder how many files I simply don't know I have.
We have had a few files just seemingly disappear, never to be seen again. Only once or twice, but still.
Mostly, organization of files behaves... oddly. It is weirdly hard to ensure everyone has a consistent view of a hierarchy / folders. Search does work, so long as you have a good idea what you are searching for. It isn't great for discoverability, or if you only have a vague idea what it is you are looking for.
If people just forgot where they put something, it seems like you need to develop and practice some organization. I work with lots of clients and use Drive and organize things into folders named for each client, and then into separate categories based on what the file is. It's relatively easy to find things.
If I happen to forget, then I've found the search works well. I use the cloudsearch page at cloudsearch.google.com