Hallo everybody! This is the first time I post something on this forum, I hope you guys can help me! I have a problem with drag and drop: sometimes, not always, but apparently just randomly, my mac would start being very slow at moving items from one folder to the other. Just out of blue, one moment it drags and drops instantaneously as it should, and the next moment it would start taking forever. The moved item would stay there, the friendly rainbow-colored disc would appear, and finally, after a few (very annoying) seconds, the item would eventually move to the new place. And once my laptop starts doing this, it would keep so until I reboot. Similarly, trashing things, and, after trashing them, permanently delete them, gets very slow in the same way. I am convinced this problems have the same cause, because in the end they all amount to updating indexes in the directory tree, right? BTW, I realize now that I haven't tested using command "mv" in the command line under these conditions... One thing I know, though... When I do, for instance, "ls <somefolder>/<initial letters of a subfoler> + <tab>, it would take very long to complete the name of the subfolder. Especially, when many subfolders correspond to the initial letters I have given, it will take a long time to complete, and when there is no such folder (because of a typo on my part) it will take a long time to tell me there is no correspondence. I emphasize once again that these problems are not always there. Usually my computer behaves well, but sometimes it would start acting weirdly. Some additional info: admittedly, my mac is not so new, like 3 years old. When I bought it, it still had Mountain Lion, if I remember well... Then I upgraded it to Mavericks, and, after noticing a general slowdown, I stopped upgrading, so I still use Mavericks. I had to change the hard drive because it had broken after my laptop fell on the ground once (sigh!), but I don't remember whether this problem started before or after that unfortunate event. I don't want to change my laptop because, except for this problem, it's still doing its job pretty well. Any idea of where this problem may come from and how to solve it? Thank you very much, I will gladly appreciate your help.