diff --git a/src/NzbDrone.Core.Test/DiskSpace/DiskSpaceServiceFixture.cs b/src/NzbDrone.Core.Test/DiskSpace/DiskSpaceServiceFixture.cs
index 8325bf1c9a..265d87fe16 100644
--- a/src/NzbDrone.Core.Test/DiskSpace/DiskSpaceServiceFixture.cs
+++ b/src/NzbDrone.Core.Test/DiskSpace/DiskSpaceServiceFixture.cs
@@ -115,6 +115,7 @@ public void should_not_check_diskspace_for_missing_movie_root_folders()
         [TestCase("/var/lib/docker")]
         [TestCase("/some/place/docker/aufs")]
         [TestCase("/etc/network")]
+        [TestCase("/Volumes/.timemachine/ABC123456-A1BC-12A3B45678C9/2025-05-13-181401.backup")]
         public void should_not_check_diskspace_for_irrelevant_mounts(string path)
         {
             var mount = new Mock<IMount>();
diff --git a/src/NzbDrone.Core/DiskSpace/DiskSpaceService.cs b/src/NzbDrone.Core/DiskSpace/DiskSpaceService.cs
index 523ed474a2..b24c32adea 100644
--- a/src/NzbDrone.Core/DiskSpace/DiskSpaceService.cs
+++ b/src/NzbDrone.Core/DiskSpace/DiskSpaceService.cs
@@ -23,7 +23,7 @@ public class DiskSpaceService : IDiskSpaceService
         private readonly IDiskProvider _diskProvider;
         private readonly Logger _logger;
 
-        private static readonly Regex _regexSpecialDrive = new Regex("^/var/lib/(docker|rancher|kubelet)(/|$)|^/(boot|etc)(/|$)|/docker(/var)?/aufs(/|$)", RegexOptions.Compiled);
+        private static readonly Regex _regexSpecialDrive = new Regex(@"^/var/lib/(docker|rancher|kubelet)(/|$)|^/(boot|etc)(/|$)|/docker(/var)?/aufs(/|$)|/\.timemachine", RegexOptions.Compiled);
 
         public DiskSpaceService(IMovieService movieService, IRootFolderService rootFolderService, IDiskProvider diskProvider, Logger logger)
         {