Floppy disks are still in use for a lot of legacy systems that can't be easily upgraded or replaced for a variety of reasons (mostly it's some combination of they still work for their intended purpose and/or the manufacturer went out of business 20 years ago).
Manila folders are still sold at office supply stores, so I'm pretty sure that they're still in widespread use.
I still use minila folders at home. all of my documents go into my file-folders in my file cabinet. I keep all sort of document in there from warenties to manuels to account information for various things like utilities medical information. I don't know how people function with out filing their papers.
Manila folders are still sold at office supply stores, so I'm pretty sure that they're still in widespread use.