There is a problem with the KiSS firmware for copyong to disk that also will be fixed in next release. (I tested this and it works fine now in the Beta 2.7.8 DP-50

. There was still a little issue on loosing some bits but i've been told that's fixed too...
If the files are copied corrupt, you have to recopy them anyway...
I hope it won't happen again but hope is all we can offer until the next release is out...