Bookmarking Files

There needs to exist a better way to organize files on our systems than what is currently offered. The method of bookmarking and synching bookmarks with a central server have made accessing bookmarks much more easier from anywhere. A similar techinque is desirable for offline files. So if I star a file and associate some tags with it will store it just like a bookmark. Optional backup to an external drive can be provided. This would make searching similar files spread all over your computer much easier and would help in realizing which are the important files among the entire clutter. I am pretty surprised why this has been completely overlooked...