diff --git a/app/src/androidTest/java/com/stevesoltys/seedvault/backend/saf/SafBackendTest.kt b/app/src/androidTest/java/com/stevesoltys/seedvault/backend/saf/SafBackendTest.kt
index 9a2adf88..530eaac1 100644
--- a/app/src/androidTest/java/com/stevesoltys/seedvault/backend/saf/SafBackendTest.kt
+++ b/app/src/androidTest/java/com/stevesoltys/seedvault/backend/saf/SafBackendTest.kt
@@ -36,4 +36,9 @@ class SafBackendTest : BackendTest(), KoinComponent {
     fun `test remove create write file`(): Unit = runBlocking {
         testRemoveCreateWriteFile()
     }
+
+    @Test
+    fun `test free space and create app blob without root folder`(): Unit = runBlocking {
+        testTestFreeSpaceAndCreateBlob()
+    }
 }
diff --git a/app/src/main/java/com/stevesoltys/seedvault/worker/AppBackupWorker.kt b/app/src/main/java/com/stevesoltys/seedvault/worker/AppBackupWorker.kt
index 5ba281f6..7e9c17c4 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/worker/AppBackupWorker.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/worker/AppBackupWorker.kt
@@ -115,6 +115,7 @@ class AppBackupWorker(
             Log.e(TAG, "Error while running setForeground: ", e)
         }
         val freeSpace = backendManager.getFreeSpace()
+        Log.i(TAG, "freeSpace: $freeSpace")
         if (freeSpace != null && freeSpace < MIN_FREE_SPACE) {
             nm.onInsufficientSpaceError()
             return Result.failure()
diff --git a/core/src/main/java/org/calyxos/seedvault/core/backends/BackendTest.kt b/core/src/main/java/org/calyxos/seedvault/core/backends/BackendTest.kt
index 9046160c..c98fe923 100644
--- a/core/src/main/java/org/calyxos/seedvault/core/backends/BackendTest.kt
+++ b/core/src/main/java/org/calyxos/seedvault/core/backends/BackendTest.kt
@@ -12,6 +12,7 @@ import kotlin.test.assertContentEquals
 import kotlin.test.assertEquals
 import kotlin.test.assertFailsWith
 import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
 
 @VisibleForTesting
 public abstract class BackendTest {
@@ -159,4 +160,23 @@ public abstract class BackendTest {
         }
     }
 
+    protected suspend fun testTestFreeSpaceAndCreateBlob() {
+        assertTrue(backend.test())
+
+        // not asserting free space as each backend may have different amounts available
+        println("Free space: ${backend.getFreeSpace()}")
+
+        val repoId = Random.nextBytes(32).toHexString()
+        val blob = AppBackupFileType.Blob(repoId, Random.nextBytes(32).toHexString())
+        val bytes = Random.nextBytes(2342)
+        try {
+            backend.save(blob).use {
+                it.write(bytes)
+            }
+            assertContentEquals(bytes, backend.load(blob as FileHandle).readAllBytes())
+        } finally {
+            backend.remove(blob)
+        }
+    }
+
 }
diff --git a/core/src/main/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackend.kt b/core/src/main/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackend.kt
index b43d97a4..d42fb9b7 100644
--- a/core/src/main/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackend.kt
+++ b/core/src/main/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackend.kt
@@ -111,7 +111,7 @@ public class WebDavBackend(
                 log.debugLog { "getFreeSpace() = $response" }
                 val quota = response.properties.getOrNull(0) as? QuotaAvailableBytes
                 val availableBytes = quota?.quotaAvailableBytes ?: -1
-                if (availableBytes > 0) {
+                if (availableBytes >= 0) {
                     cont.resume(availableBytes)
                 } else {
                     cont.resume(null)
diff --git a/core/src/test/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackendTest.kt b/core/src/test/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackendTest.kt
index e4fb4ca7..5a118e47 100644
--- a/core/src/test/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackendTest.kt
+++ b/core/src/test/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackendTest.kt
@@ -22,4 +22,9 @@ public class WebDavBackendTest : BackendTest() {
     public fun `test remove, create, write file`(): Unit = runBlocking {
         testRemoveCreateWriteFile()
     }
+
+    @Test
+    public fun `test, free space and create app blob without root folder`(): Unit = runBlocking {
+        testTestFreeSpaceAndCreateBlob()
+    }
 }