This script syncs an Android with a Mac using adb and adb-sync. You will need to edit the script to meet your own needs. You will need to enable 'USB Debugging' mode in Developer options on your Android in order for this to work.
WARNING: This app will delete files on your android. Be careful!
adb
brew install android-platform-toolsadb-sync
git clone https://github.com/google/adb-sync.gitSome knowledge of adb and the Android file system is required. Runs on macOS.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.