"He who marches out of step hears another drum." ~ Ken Kesey
There is a good chance I completely misunderstood the question.
My files system is very easy. I worked in a few Design firms and had a few of my own file systems at other companies that I worked at. Nothing works perfect and there will always be hard to find files, customers, proofs...I don't mark anything finalI never delete any filesI never put jobs in one folder for a client. I have one folder that is clientsEach job gets a new folderEach folder is the customer name (shortened) and then shirt design nameNeve use customer numbers because then you have to look up the number...The name is short So if its The construction boys inc... Folder is Construction BoysThe name of the design is ether the words on the shirt or just logo shirts for uniform type shirts. Proofs are in the customer folder and the name of the files is 2 letters for the name and then proof. So CB CB Proof 1.pdf Each edit to the design gets a new file. So the second round of changes the files is CB Proof 2.pdf This is all in the customer job folder Construction Boys- logo shirts. I never delete any rounds of changes. They just stay in the folder. Then when its time to go to print That design goes on my template file and the template file is saved into that same folder. By not deleting any file I have a record of the changed and since everything is dated, the date the changes where made. Comes in handy when they want to revert back or use a old design. I have been doing this for almost 7 years and have never lost a file. The client folder has Many folders in it but easy to find everything. You could make one master folder per client but I haven't needed to yet. The hardest part about file systems is figuring out the name are how things are named. After that is just being consistent.