Hi all, recently I've noticed that when connecting my external HDD (not my backup one) to my mac, it is very slow to eject and when I try to see subfolders of a folder it can get a few minutes to show them (true is that they're a lot of files, but I never had this problem before). I had the "disk disconnected without ejecting first" warning a couple of times when I had left the disk connected for a long time without using it (I have the option to put disk to sleep after a set amount of time in preferences). I might be wrong, but I think this slow reaction started to happen after the 10.9.5 update, but I'm not completely sure. Just out of curiosity I ran DU on it and it says that the disk needs to be repaired. Is it a disk problem or a mac one? If I repair it what will happen to the files on it? It's a NTFS formatted drive.