If you want to know how long does it take to backup on icloud (https://datarecovee.com/knowledge-base/how-long-does-backing-up-to-icloud-take/), it depends on the total amount of data, internet upload speed, and device settings. For example, backing up a small number of files will only take a short period of time. However, backing up an iPhone or an iPad containing a large volume of data will take hours. The initial backup will take longer since a lot of data is being uploaded. It will help if you use a reliable Wi-Fi connection, plug your iPhone/iPad into a power source, and ensure that your iCloud account has sufficient storage space.