diff --git a/model/folder.go b/model/folder.go
index 5207a9db0..0fbfd2523 100644
--- a/model/folder.go
+++ b/model/folder.go
@@ -42,15 +42,21 @@ func (f Folder) String() string {
 // FolderID generates a unique ID for a folder in a library.
 // The ID is generated based on the library ID and the folder path relative to the library root.
 // Any leading or trailing slashes are removed from the folder path.
-func FolderID(lib Library, path string) string {
-	path = strings.TrimPrefix(path, lib.Path)
-	path = strings.TrimPrefix(path, string(os.PathSeparator))
-	path = filepath.Clean(path)
-	key := fmt.Sprintf("%d:%s", lib.ID, path)
+func FolderID(lib Library, folderPath string) string {
+	folderPath = strings.TrimPrefix(folderPath, lib.Path)
+	folderPath = strings.TrimPrefix(folderPath, string(os.PathSeparator))
+	// Folder IDs must be stable across operating systems, so normalize to
+	// forward slashes (path.Clean, not filepath.Clean) before hashing;
+	// otherwise a nested path on Windows would hash with back-slashes.
+	folderPath = path.Clean(filepath.ToSlash(folderPath))
+	key := fmt.Sprintf("%d:%s", lib.ID, folderPath)
 	return id.NewHash(key)
 }
 
 func NewFolder(lib Library, folderPath string) *Folder {
+	// path.Split/path.Clean below only treat "/" as a separator, so normalize
+	// OS separators first to derive dir/name correctly on Windows.
+	folderPath = filepath.ToSlash(folderPath)
 	newID := FolderID(lib, folderPath)
 	dir, name := path.Split(folderPath)
 	dir = path.Clean(dir)
diff --git a/model/folder_test.go b/model/folder_test.go
index 4c1b4c2b7..0535f6987 100644
--- a/model/folder_test.go
+++ b/model/folder_test.go
@@ -7,7 +7,6 @@ import (
 
 	"github.com/navidrome/navidrome/model"
 	"github.com/navidrome/navidrome/model/id"
-	"github.com/navidrome/navidrome/tests"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 )
@@ -67,7 +66,6 @@ var _ = Describe("Folder", func() {
 
 		When("the folder has multiple subdirs", func() {
 			It("should return the correct folder ID", func() {
-				tests.SkipOnWindows("path separator bug (#TBD-path-sep-model)")
 				folderPath := filepath.FromSlash("/music/rock/metal")
 				expectedID := id.NewHash("1:rock/metal")
 				Expect(model.FolderID(lib, folderPath)).To(Equal(expectedID))
@@ -77,7 +75,6 @@ var _ = Describe("Folder", func() {
 
 	Describe("NewFolder", func() {
 		It("should create a new SubFolder with the correct attributes", func() {
-			tests.SkipOnWindows("path separator bug (#TBD-path-sep-model)")
 			folderPath := filepath.FromSlash("rock/metal")
 			folder := model.NewFolder(lib, folderPath)
 
diff --git a/model/mediafile.go b/model/mediafile.go
index 99aee591e..4ae48141f 100644
--- a/model/mediafile.go
+++ b/model/mediafile.go
@@ -525,11 +525,13 @@ func (mfs MediaFiles) ToM3U8(title string, absolutePaths bool) string {
 	buf.WriteString(fmt.Sprintf("#PLAYLIST:%s\n", title))
 	for _, t := range mfs {
 		buf.WriteString(fmt.Sprintf("#EXTINF:%.f,%s - %s\n", t.Duration, t.Artist, t.Title))
+		p := t.Path
 		if absolutePaths {
-			buf.WriteString(t.AbsolutePath() + "\n")
-		} else {
-			buf.WriteString(t.Path + "\n")
+			p = t.AbsolutePath()
 		}
+		// Emit forward slashes so the exported .m3u8 is consistent across OSes
+		// (AbsolutePath returns native separators on Windows).
+		buf.WriteString(filepath.ToSlash(p) + "\n")
 	}
 	return buf.String()
 }
diff --git a/model/mediafile_test.go b/model/mediafile_test.go
index 9ca3489bb..6ba0ce3be 100644
--- a/model/mediafile_test.go
+++ b/model/mediafile_test.go
@@ -6,7 +6,6 @@ import (
 	"github.com/navidrome/navidrome/conf"
 	"github.com/navidrome/navidrome/conf/configtest"
 	. "github.com/navidrome/navidrome/model"
-	"github.com/navidrome/navidrome/tests"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 )
@@ -477,9 +476,6 @@ var _ = Describe("MediaFiles", func() {
 
 			DescribeTable("generates correct output",
 				func(absolutePaths bool, expectedContent string) {
-					if absolutePaths {
-						tests.SkipOnWindows("path separator bug (#TBD-path-sep-model)")
-					}
 					result := mfs.ToM3U8("Multi Track", absolutePaths)
 					Expect(result).To(Equal(expectedContent))
 				},
@@ -500,7 +496,6 @@ var _ = Describe("MediaFiles", func() {
 
 		Context("path variations", func() {
 			It("handles different path structures", func() {
-				tests.SkipOnWindows("path separator bug (#TBD-path-sep-model)")
 				mfs = MediaFiles{
 					{Title: "Root", Artist: "Artist", Duration: 60, Path: "song.mp3", LibraryPath: "/lib"},
 					{Title: "Nested", Artist: "Artist", Duration: 60, Path: "deep/nested/song.mp3", LibraryPath: "/lib"},
diff --git a/model/playlist_test.go b/model/playlist_test.go
index d98c85716..fadf98e3e 100644
--- a/model/playlist_test.go
+++ b/model/playlist_test.go
@@ -7,7 +7,6 @@ import (
 	"github.com/navidrome/navidrome/conf/configtest"
 	"github.com/navidrome/navidrome/model"
 	"github.com/navidrome/navidrome/model/criteria"
-	"github.com/navidrome/navidrome/tests"
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 )
@@ -33,7 +32,6 @@ var _ = Describe("Playlist", func() {
 			}
 		})
 		It("generates the correct M3U format", func() {
-			tests.SkipOnWindows("path separator bug (#TBD-path-sep-model)")
 			expected := `#EXTM3U
 #PLAYLIST:Mellow sunset
 #EXTINF:378,Morcheeba feat. Kurt Wagner - What New York Couples Fight About