Open Source Unix Shell System Software for BSD

This project consists of two shell scrips. One splits an adb backup into several ones by app name extracting the contents of the tars to a temporal folder and then re-taring everything to get the individual ab for each android app. The other shell script uses Tar Binary Splitter to divide the main tar inside the adb backup without extracting anything from the tar, so is by far the best method. Other software is needed. The bundle is included in Android Backup Extractor, with the full README as well: https://sourceforge.net/projects/adbextractor/

Modern android devices don't use anymore Mass Storage Mode. Instead they use the internal sdcard as a virtually mounted subfolder inside /data partition. It would be ok if MTP preserved correctly timestamps, which doesn't. Other options that could work, like FTP with MFMT command doesn't work properly on android either. Droid Explorer is enough for files, but doesn't support folders. This handy bash script helps you to backup and restore the last modified timestamp for folders recursively. If you want to use an android native app, there's File Timestamp, however the txt format is different. https://play.google.com/store/apps/details?id=br.com.pogsoftwares.filetimestamp

Sign APK (or JAR) archives by OpenSSL, using standard private keys and certificates instead of keytool-managed keystores.