I have bought a new Sony home theatre system, model is TZ 210. Normally I connect either a 4 GB USB or a 500 GB External Hard disk to the Home theatre through USB. I observed some problems during this and I am unable to figure out the root cause. System is unable to play some .avi files. Infact, It plays first 20-30 secs of the files and suddenly stops/hangs. This play/hang problem was observed while playing most of the files. I need to know, is this the problem with home theatre ? Please share your thoughts.