Hello Mac Guru's... I have been running a OS X Snow Leopard server for the past several years, with 3 macs networking through ethernet. Recently the mac mini server died with a blinking folder icon on it. The important files are stored on an external hard drive with the following qualities: -G-Speed Q 3TB Raid Protected -Wired into the Serial ATA port so it operated as an internal drive -Format Mac OS Extended (not journaled) In order to get up and running asap, I took a new Mac Mini 2.7 ghz i7 running 10.9.5 and hooked up the G-Speed Q using Firewire 800. I setup file sharing in networking, put in in place of the old mini and hooked up the ethernet, and presto! It works... Except when it doesn't!!!! We have been getting sporadic error messages such as: "The Finder can't complete the operation becasue some data in "File types .3dm, pdf, etc" can't be read or written. (Error code -36). ... when copying, saving, or moving files on the new 'server'. But we click "OK" and it seems the file is just fine. But this makes me worry. Also, one user is having very strange behavior when working of the new 'server'. Sometimes files won't even open, folders seem empty, etc. What is going on? What should i do to fix this? Should I setup Yosemite Server? Should I get a Windows Server? HOW DO I FIX THIS ISSUE!? THANK YOU SO MUCH! Mac gurus the world over... superb community. Thanks, r.