Many of the budget tablets featuring Android OS have a set onboard storage with an optional slot to insert the SD card into the device according to the expandable storage specified by the manufacturer. A portion of the internal storage is consumed by default for Android applications, and once you add third-party apps in addition to that, the device may run out of storage. However, you can transfer some of the applications into the SD card using the inbuilt Settings in Android Marshmallow to keep the best low cost tablet performing well.
Note that if you want to transfer back the application into the internal storage in the future, you can navigate the same path. Further, if the option to Change is unavailable to access, then moving the application into the SD card won’t be possible due to technical restrictions in Android.
If that is the concern you are facing in your device, then you can enable adaptable storage, so that future downloads of apps will go to the shared storage more or less. However, before proceeding with that, keep a backup of the files in your Android tablet. Apart from that, you need a fast performing SD card to make sure that the external storage functions smoothly when you enable the feature.
Android would then show you an estimate of the time needed in order to complete the transferring of SD card data into the adaptable storage. Once the transfer completes in your tablet, tap on Done.