Hello, I am having some problems copying files from an external hard drive and I thought I might ask for help. I have a macbook pro late 2008 with latest Mavericks installed. I have two external hard drives, usb. An old one (250gb) and a brand new one (1tb). Both formatted Macosx journaled. I used the old one as an external storage for my huge collection of raw photos (DNGs, Cr2, etc). After 6 years of great service, I thought I should migrate everything to a new one (and make a backup copy too), just in case. Well, turns out I decided to do it too late! Copying files from the old to the new one (directly by connecting them both at the same time and dragging the files from the old to the new one) I get after a while an error on a specific file: 'the file cannot be read or written'. Right, I can just skip the file and copy the others, but I get this error for many files and it becomes very impractical to copy large amounts of data. I run Disk Utility on the old one but it found no errors. I can delete the corrupt files with no problem from the old hard drive but I cannot copy them neither to the other external hard drive nor to my internal hard drive. I tried to access the files (for instance opening them with photoshop), but it returns an error. All I can do when I find a corrupt file is delete it and move to the next. This would not be too difficult, except that I don't know which files are corrupt and which are not. I could try copying them one by one, but I would need ages to do that. Also dragging a batch a waiting for the error to crop up, delete the corrupt file and redo the same thing is still very impractical. Any advices? Thanks!