diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index 192bc5d6a..c86ffa64b 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -7,6 +7,7 @@
 - [Import] Avoid blocking the UI when dropping a big OVA file on the UI (PR [#4018](https://github.com/vatesfr/xen-orchestra/pull/4018))
 - [Backup NG/Overview] Make backup list title clearer [#4111](https://github.com/vatesfr/xen-orchestra/issues/4111) (PR [#4129](https://github.com/vatesfr/xen-orchestra/pull/4129))
 - [Dashboard] Hide "Report" section for non-admins [#4123](https://github.com/vatesfr/xen-orchestra/issues/4123) (PR [#4126](https://github.com/vatesfr/xen-orchestra/pull/4126))
+- [VM migration] Auto select default SR and collapse optional actions [#3326](https://github.com/vatesfr/xen-orchestra/issues/3326) (PR [#4121](https://github.com/vatesfr/xen-orchestra/pull/4121))
 
 ### Bug fixes
 
diff --git a/packages/xo-web/src/common/intl/locales/fr.js b/packages/xo-web/src/common/intl/locales/fr.js
index 54525ad8b..efa32d3bd 100644
--- a/packages/xo-web/src/common/intl/locales/fr.js
+++ b/packages/xo-web/src/common/intl/locales/fr.js
@@ -3016,7 +3016,8 @@ export default {
     "Le SR par défaut n'est pas connecté à l'hôte",
 
   // Original text: "For each VDI, select an SR:"
-  chooseSrForEachVdisModalSelectSr: 'Pour chaque VDI, sélectionner un SR :',
+  chooseSrForEachVdisModalSelectSr:
+    'Pour chaque VDI, sélectionner un SR (optionnel)',
 
   // Original text: "Select main SR…"
   chooseSrForEachVdisModalMainSr: 'Sélectionner le SR principal…',
diff --git a/packages/xo-web/src/common/intl/messages.js b/packages/xo-web/src/common/intl/messages.js
index 7b468af82..cab29d4c5 100644
--- a/packages/xo-web/src/common/intl/messages.js
+++ b/packages/xo-web/src/common/intl/messages.js
@@ -1609,7 +1609,7 @@ const messages = {
   migrateVmNoTargetHostMessage: 'A target host is required to migrate a VM',
   migrateVmNoDefaultSrError: 'No default SR',
   migrateVmNotConnectedDefaultSrError: 'Default SR not connected to host',
-  chooseSrForEachVdisModalSelectSr: 'For each VDI, select an SR:',
+  chooseSrForEachVdisModalSelectSr: 'For each VDI, select an SR (optional)',
   chooseSrForEachVdisModalMainSr: 'Select main SR…',
   chooseSrForEachVdisModalVdiLabel: 'VDI',
   chooseSrForEachVdisModalSrLabel: 'SR*',
diff --git a/packages/xo-web/src/common/xo/choose-sr-for-each-vdis-modal/index.js b/packages/xo-web/src/common/xo/choose-sr-for-each-vdis-modal/index.js
index 5629f10c4..a09a2702b 100644
--- a/packages/xo-web/src/common/xo/choose-sr-for-each-vdis-modal/index.js
+++ b/packages/xo-web/src/common/xo/choose-sr-for-each-vdis-modal/index.js
@@ -70,7 +70,8 @@ export default class ChooseSrForEachVdisModal extends Component {
         {props.vdis != null && mainSr != null && (
           <Collapsible
             buttonText={_('chooseSrForEachVdisModalSelectSr')}
-            collapsible={props.vdis.length >= 3}
+            collapsible
+            size='small'
           >
             <br />
             <Container>
diff --git a/packages/xo-web/src/common/xo/migrate-vm-modal/index.js b/packages/xo-web/src/common/xo/migrate-vm-modal/index.js
index 1e38886bd..a10dfb391 100644
--- a/packages/xo-web/src/common/xo/migrate-vm-modal/index.js
+++ b/packages/xo-web/src/common/xo/migrate-vm-modal/index.js
@@ -152,7 +152,7 @@ export default class MigrateVmModalBody extends BaseComponent {
       return
     }
 
-    const { vbds, vm } = this.props
+    const { pools, vbds, vm } = this.props
     const intraPool = vm.$pool === host.$pool
 
     // Intra-pool
@@ -178,7 +178,7 @@ export default class MigrateVmModalBody extends BaseComponent {
         intraPool,
         mapVifsNetworks: undefined,
         migrationNetwork: undefined,
-        targetSrs: {},
+        targetSrs: { mainSr: pools[host.$pool].default_SR },
       })
       return
     }