taFileSync is an application for synchronizing two directory trees on the local file system. It can for example be used to synchronize the storage card with an OTG (on-the-go) USB stick or to make a backup of the internal to the external storage card.The app has following features: * 1-way and 2-way sync * unlimited number of sync jobs * preview of differences * time offset handling * update source timestamp (e.g. when no rights to update target timestamps under Android KitKat) * compare by content * compare by ignoring timestamps (when mirroring by content) * show differences in text files (needs the app taTextDiff) On Android 4.4.x (KitKat) you should use a time offset of 1000 because KitKat adjusts the timestamps on external SDcards to even seconds.There is a PRO app (taFileSync PRO), which activates additional functionality:* list of directories to be excluded* more than 1 time offset can be ignored* Job log files* Jobs can be run automatically (e.g. with Tasker)* SEND Intent for adhoc directory compare (e.g. with Total Commander)* VIEW Intent for .json files to pass data to the appFor more details see the online version of the built-in help file: http://www.tanapro.ch/products/taFileSync/help-en.htmlSupport forum:http://groups.google.com/forum/#!forum/tanaproHistory:http://www.tanapro.ch/products/taFileSync/history-en.html