diff --git a/client/src/pages/ConfigPage.tsx b/client/src/pages/ConfigPage.tsx
index 4d78d07..56c6d57 100644
--- a/client/src/pages/ConfigPage.tsx
+++ b/client/src/pages/ConfigPage.tsx
@@ -1,3 +1,4 @@
+import { useEffect } from "react";
 import { useNavigate, useParams } from "react-router-dom";
 import { DatabaseConfigForm } from "@/components/DatabaseConfigForm";
 import api from "@/lib/api";
@@ -8,6 +9,19 @@ export function ConfigPage() {
   const { dbType } = useParams<{ dbType: string }>();
   const navigate = useNavigate();
 
+  // Clear draft data when navigating away from the config page
+  useEffect(() => {
+    return () => {
+      if (dbType) {
+        try {
+          sessionStorage.removeItem(`db_mover_draft_${dbType}`);
+        } catch {
+          // Ignore storage access errors (e.g. when storage is blocked)
+        }
+      }
+    };
+  }, [dbType]);
+
   const handleStartCopy = async (config: {
     sourceUri: string;
     targetUri: string;
@@ -23,7 +37,7 @@ export function ConfigPage() {
       const { jobId } = res.data;
 
       // Store migration config for retry functionality
-      localStorage.setItem(
+      sessionStorage.setItem(
         `migration_${jobId}`,
         JSON.stringify({
           type: "copy",
diff --git a/client/src/pages/MigrationPage.tsx b/client/src/pages/MigrationPage.tsx
index 6c0c2ee..9493750 100644
--- a/client/src/pages/MigrationPage.tsx
+++ b/client/src/pages/MigrationPage.tsx
@@ -24,7 +24,7 @@ export function MigrationPage() {
 
     try {
       // Get stored migration config
-      const storedConfig = localStorage.getItem(`migration_${jobId}`);
+      const storedConfig = sessionStorage.getItem(`migration_${jobId}`);
       if (!storedConfig) {
         toast.error("Retry failed", {
           description:
@@ -38,9 +38,12 @@ export function MigrationPage() {
       // Start new migration with same config
       const res = await api.post("/migrate/start", config);
       const newJobId = res.data.jobId;
-
-      // Store config for new job
-      localStorage.setItem(`migration_${newJobId}`, JSON.stringify(config));
+      try {
+        // Store config for new job
+        sessionStorage.setItem(`migration_${newJobId}`, JSON.stringify(config));
+      } catch (error) {
+        // Ignore storage access errors (e.g. when storage is blocked)
+      }
 
       // Navigate to new migration page
       navigate(`/migration/${newJobId}`);
@@ -84,6 +87,26 @@ export function MigrationPage() {
 
     return () => {
       es.close();
+
+      // Clean up session storage when navigating away
+      if (jobId) {
+        try {
+          const storedConfig = sessionStorage.getItem(`migration_${jobId}`);
+          if (storedConfig) {
+            const parsedConfig = JSON.parse(storedConfig);
+            const storedDbType =
+              typeof parsedConfig?.dbType === "string"
+                ? parsedConfig.dbType.trim()
+                : "";
+            if (storedDbType) {
+              sessionStorage.removeItem(`db_mover_draft_${storedDbType}`);
+            }
+          }
+          sessionStorage.removeItem(`migration_${jobId}`);
+        } catch (storageError) {
+          console.error("Error cleaning up migration storage", storageError);
+        }
+      }
     };
   }, [jobId]);