diff --git a/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsFragment.kt b/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsFragment.kt
index 132b3147..a48deb23 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsFragment.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsFragment.kt
@@ -91,8 +91,14 @@ class SettingsFragment : PreferenceFragmentCompat() {
 
         backupLocation = findPreference("backup_location")!!
         backupLocation.setOnPreferenceClickListener {
-            viewModel.chooseBackupLocation()
-            true
+            if (viewModel.isBackupRunning.value) {
+                // don't allow changing backup destination while backup is running
+                // TODO we could show toast or snackbar here
+                false
+            } else {
+                viewModel.chooseBackupLocation()
+                true
+            }
         }
 
         autoRestore = findPreference(PREF_KEY_AUTO_RESTORE)!!
diff --git a/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsViewModel.kt b/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsViewModel.kt
index 7981fed0..e1de8f1f 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsViewModel.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/settings/SettingsViewModel.kt
@@ -80,7 +80,7 @@ internal class SettingsViewModel(
 
     override val isRestoreOperation = false
 
-    private val isBackupRunning: StateFlow<Boolean>
+    val isBackupRunning: StateFlow<Boolean>
     private val mBackupPossible = MutableLiveData(false)
     val backupPossible: LiveData<Boolean> = mBackupPossible