The origin of the problem seems to be a change in Samba itself. So I presume sooner or later other distributions will have the same problem - as soon as they upgrade Samba to the same level.
This is the link to the bug at Samba: https://bugzilla.samba.org/show_bug.cgi?id=10584 It looks like this bug affects Zyxel NAS based devices. Among which are the Medion devices. IOMega seems to be affected too. They're on it now - looking to the Samba source code changes done by Zyxel. I hope they find out soon what's going on - because I'm not going to throw away a perfectly good working device. ** Bug watch added: Samba Bugzilla #10584 https://bugzilla.samba.org/show_bug.cgi?id=10584 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1312362 Title: Can't copy a file from SMB share to the local file system: Software caused connection abort Status in “nautilus” package in Ubuntu: Confirmed Bug description: The error reported is "Software caused connection abort". See the screenshot. It pops up right at the end of the copy operation. This doesn't happen when copying the very same file using a different protocol. Neither does it happen when using another device to copy the very same file over SMB. It worked until the upgrade from 13.10 to 14.04. Also see http://askubuntu.com/questions/450206/how-to-fix-a-software- caused-connection-abort-error-in-ubuntu-14-04 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: nautilus 1:3.10.1-0ubuntu8 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 NonfreeKernelModules: wl nvidia ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Thu Apr 24 20:35:35 2014 ExecutablePath: /usr/bin/nautilus GsettingsChanges: b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'group', 'where', 'mime_type', 'octal_permissions', 'owner', 'permissions']" InstallationDate: Installed on 2011-10-14 (923 days ago) InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) ProcEnviron: LANGUAGE=en_US PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: nautilus UpgradeStatus: Upgraded to trusty on 2014-04-19 (5 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1312362/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

