Fix URL

src/containers/AddMount/AddMount.js

@@ -34,7 +34,7 @@ const default_state = {
   HostNameOrIp: '',
   Name: '',
   Port: 20000,
-  Provider: '',
+  Provider: Constants.S3_PROVIDER_LIST[0],
   Region: 'any',
   SecretKey: '',
   Token: '',
@@ -169,7 +169,7 @@ export default connect(mapStateToProps, mapDispatchToProps)(class extends Compon
           <div style={{paddingLeft: 'var(--default_spacing)'}}/>
           <DropDown changed={e => this.setState({Provider: e.target.value})}
                     items={Constants.S3_PROVIDER_LIST}
-                    selected={Constants.S3_PROVIDER_LIST[0]}/>
+                    selected={this.state.Provider}/>
         </div>
         <div style={{paddingTop: 'var(--default_spacing)'}}/>
         <div style={{display: 'flex', flexDirection: 'row'}}>