diff --git a/pkg/metricstore/archive.go b/pkg/metricstore/archive.go
index cab4c24f..784348b5 100644
--- a/pkg/metricstore/archive.go
+++ b/pkg/metricstore/archive.go
@@ -158,8 +158,7 @@ func cleanupCheckpoints(dir string, cleanupDir string, from int64, deleteInstead
 		return 0, err
 	}
 
-	extension := Keys.Checkpoints.FileFormat
-	files, err := findFiles(entries, from, extension, false)
+	files, err := findFiles(entries, from, false)
 	if err != nil {
 		return 0, err
 	}
diff --git a/pkg/metricstore/checkpoint.go b/pkg/metricstore/checkpoint.go
index 715566e4..b4097ff2 100644
--- a/pkg/metricstore/checkpoint.go
+++ b/pkg/metricstore/checkpoint.go
@@ -415,7 +415,7 @@ func enqueueCheckpointHosts(dir string, work chan<- [2]string) error {
 //
 // Uses worker pool to load cluster/host combinations. Periodically triggers GC
 // to prevent excessive heap growth. Returns number of files loaded and any errors.
-func (m *MemoryStore) FromCheckpoint(dir string, from int64, extension string) (int, error) {
+func (m *MemoryStore) FromCheckpoint(dir string, from int64) (int, error) {
 	var wg sync.WaitGroup
 	work := make(chan [2]string, Keys.NumWorkers*4)
 	n, errs := int32(0), int32(0)
@@ -426,7 +426,7 @@ func (m *MemoryStore) FromCheckpoint(dir string, from int64, extension string) (
 			defer wg.Done()
 			for host := range work {
 				lvl := m.root.findLevelOrCreate(host[:], len(m.Metrics))
-				nn, err := lvl.fromCheckpoint(m, filepath.Join(dir, host[0], host[1]), from, extension)
+				nn, err := lvl.fromCheckpoint(m, filepath.Join(dir, host[0], host[1]), from)
 				if err != nil {
 					cclog.Errorf("[METRICSTORE]> error while loading checkpoints for %s/%s: %s", host[0], host[1], err.Error())
 					atomic.AddInt32(&errs, 1)
@@ -465,57 +465,7 @@ func (m *MemoryStore) FromCheckpointFiles(dir string, from int64) (int, error) {
 		cclog.Debugf("[METRICSTORE]> %#v Directory created successfully", dir)
 	}
 
-	// Config read (replace with your actual config read)
-	fileFormat := Keys.Checkpoints.FileFormat
-	if fileFormat == "" {
-		fileFormat = "avro"
-	}
-
-	// Map to easily get the fallback format
-	oppositeFormat := map[string]string{
-		"json": "avro",
-		"avro": "json",
-	}
-
-	// First, attempt to load the specified format
-	if found, err := checkFilesWithExtension(dir, fileFormat); err != nil {
-		return 0, fmt.Errorf("[METRICSTORE]> error checking files with extension: %v", err)
-	} else if found {
-		cclog.Infof("[METRICSTORE]> Loading %s files because fileformat is %s", fileFormat, fileFormat)
-		return m.FromCheckpoint(dir, from, fileFormat)
-	}
-
-	// If not found, attempt the opposite format
-	altFormat := oppositeFormat[fileFormat]
-	if found, err := checkFilesWithExtension(dir, altFormat); err != nil {
-		return 0, fmt.Errorf("[METRICSTORE]> error checking files with extension: %v", err)
-	} else if found {
-		cclog.Infof("[METRICSTORE]> Loading %s files but fileformat is %s", altFormat, fileFormat)
-		return m.FromCheckpoint(dir, from, altFormat)
-	}
-
-	return 0, nil
-}
-
-// checkFilesWithExtension walks a directory tree to check if files with the given extension exist.
-func checkFilesWithExtension(dir string, extension string) (bool, error) {
-	found := false
-
-	err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return fmt.Errorf("[METRICSTORE]> error accessing path %s: %v", path, err)
-		}
-		if !info.IsDir() && filepath.Ext(info.Name()) == "."+extension {
-			found = true
-			return nil
-		}
-		return nil
-	})
-	if err != nil {
-		return false, fmt.Errorf("[METRICSTORE]> error walking through directories: %s", err)
-	}
-
-	return found, nil
+	return m.FromCheckpoint(dir, from)
 }
 
 func (l *Level) loadAvroFile(m *MemoryStore, f *os.File, from int64) error {
@@ -729,7 +679,7 @@ func (l *Level) loadFile(cf *CheckpointFile, m *MemoryStore) error {
 	return nil
 }
 
-func (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64, extension string) (int, error) {
+func (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64) (int, error) {
 	direntries, err := os.ReadDir(dir)
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -748,33 +698,38 @@ func (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64, extension
 				children: make(map[string]*Level),
 			}
 
-			files, err := child.fromCheckpoint(m, path.Join(dir, e.Name()), from, extension)
+			files, err := child.fromCheckpoint(m, path.Join(dir, e.Name()), from)
 			filesLoaded += files
 			if err != nil {
 				return filesLoaded, err
 			}
 
 			l.children[e.Name()] = child
-		} else if strings.HasSuffix(e.Name(), "."+extension) {
+		} else if strings.HasSuffix(e.Name(), ".json") || strings.HasSuffix(e.Name(), ".avro") {
 			allFiles = append(allFiles, e)
 		} else {
 			continue
 		}
 	}
 
-	files, err := findFiles(allFiles, from, extension, true)
+	files, err := findFiles(allFiles, from, true)
 	if err != nil {
 		return filesLoaded, err
 	}
 
 	loaders := map[string]func(*MemoryStore, *os.File, int64) error{
-		"json": l.loadJSONFile,
-		"avro": l.loadAvroFile,
+		".json": l.loadJSONFile,
+		".avro": l.loadAvroFile,
 	}
 
-	loader := loaders[extension]
-
 	for _, filename := range files {
+		ext := filepath.Ext(filename)
+		loader := loaders[ext]
+		if loader == nil {
+			cclog.Warnf("Unknown extension for file %s", filename)
+			continue
+		}
+
 		// Use a closure to ensure file is closed immediately after use
 		err := func() error {
 			f, err := os.Open(path.Join(dir, filename))
@@ -798,10 +753,12 @@ func (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64, extension
 // This will probably get very slow over time!
 // A solution could be some sort of an index file in which all other files
 // and the timespan they contain is listed.
-func findFiles(direntries []fs.DirEntry, t int64, extension string, findMoreRecentFiles bool) ([]string, error) {
+// NOTE: This now assumes that you have distinct timestamps for json and avro files
+// Also, it assumes that the timestamps are not overlapping/self-modified.
+func findFiles(direntries []fs.DirEntry, t int64, findMoreRecentFiles bool) ([]string, error) {
 	nums := map[string]int64{}
 	for _, e := range direntries {
-		if !strings.HasSuffix(e.Name(), "."+extension) {
+		if !strings.HasSuffix(e.Name(), ".json") && !strings.HasSuffix(e.Name(), ".avro") {
 			continue
 		}