Acer Aspire E1-771G User Manual page 38

Note: Since the recovery backup requires at least 16 GB of storage
after formatting, it is recommended to use a USB drive with a capacity
of 32 GB or larger.
1. From Start, type 'Recovery' and then click Acer Recovery
Management in the list of apps.
2. Click Create Factory Default Backup. The Recovery Drive window
Recovery - 37