You can view details of the SharePoint permissions for a user on the Permissions tab.
To view the SharePoint permissions assigned to a user
By default, the Overview tab displays a summary of the selected user
Use the device filter in the content pane to search for specific devices where selected user has permissions. The Devices with permission filter is applied by default. The filter pane displays the list of filers or web applications that have some shares or site collections on which the selected user has permissions.
Or, click the drop-down to select a specific type of storage device, disabled filers or web applications, or devices where the user has permissions.
At the share-level in the hierarchy, you can also filter the paths using other predefined filters, such as disabled share or site collections where the user has permissions.