fix file system not refresh on exFAT

(cherry picked from commit 9d309096c9999b7c3da02781e4a6adda5933dbb3)

editor/editor_file_system.cpp

@@ -837,7 +837,7 @@ void EditorFileSystem::_scan_fs_changes(EditorFileSystemDirectory *p_dir, const
 	bool updated_dir = false;
 	String cd = p_dir->get_path();
 
-	if (current_mtime != p_dir->modified_time || using_fat_32) {
+	if (current_mtime != p_dir->modified_time || using_fat32_or_exfat) {
 
 		updated_dir = true;
 		p_dir->modified_time = current_mtime;
@@ -1855,8 +1855,8 @@ EditorFileSystem::EditorFileSystem() {
 	if (da->change_dir("res://.import") != OK) {
 		da->make_dir("res://.import");
 	}
-	//this should probably also work on Unix and use the string it returns for FAT32
-	using_fat_32 = da->get_filesystem_type() == "FAT32";
+	// This should probably also work on Unix and use the string it returns for FAT32 or exFAT
+	using_fat32_or_exfat = (da->get_filesystem_type() == "FAT32" || da->get_filesystem_type() == "exFAT");
 	memdelete(da);
 
 	scan_total = 0;

editor/editor_file_system.h

@@ -234,7 +234,7 @@ class EditorFileSystem : public Node {
 
 	static Error _resource_import(const String &p_path);
 
-	bool using_fat_32; //workaround for projects in FAT32 filesystem (pendrives, most of the time)
+	bool using_fat32_or_exfat; // Workaround for projects in FAT32 or exFAT filesystem (pendrives, most of the time)
 
 protected:
 	void _notification(int p_what);