In Power Apps, SaveData and LoadData are functions used to manage data persistence:

• SaveData: This function stores a collection of data locally on the app host under a specified name. It allows you to save data for later use, even when the app is closed.

• LoadData: This function retrieves a previously saved collection by its name. It loads the saved data back into the app, allowing you to access it again.

These functions are useful for maintaining app state or caching data locally, especially when internet connectivity is unreliable. However, they are typically used for temporary storage and are not meant for long-term data management or sharing data between apps.

Syntax:
-SaveData( Collection, CollectionName )
-LoadData( Collection, CollectionName [, IgnoreNonexistentFile ]), where IgnoreNonexistentFile is an optional parameter. It accepts bool value which tells how to behave if provided collection is not found.

SaveData function used to store the provided collection in device’s cache, so that if we close the app and reopen it, the data still persists, whereas, LoadData function is used to load that stored data from device’s cache into the app associated memory pool.

for example:

1. Creating a collection: Collect( ItemsCollection, { Item: TextInput1.Text, Quatity: txtQuatity.Text } )

2. Saving the collection: SaveData( ItemsCollection, “LocalSavedItems” )

3. loading the collection: LoadData( ItemsCollection, “LocalSavedItems” )

We can configure these function on OnSelect action of button control.