Use APKPure App
Get Link Folder old version APK for Android
this application to link two folders located on externalto directories on intern
It is still a beta, support us to develop this app.(go to > menu>Send problems to developer>Describe your problem and send)
This an application to link two folders located on external_sd to directories on internal memory (/sdcard/). This way You can transfer large application data directories to external_sd. Could be usefull with
ex.:
games from Gameloft, other like Shadowgun, applications like CamScanner.
Requires ROOT !