diff --git a/copyparty/__main__.py b/copyparty/__main__.py
index 20c4d881..7a2206c1 100644
--- a/copyparty/__main__.py
+++ b/copyparty/__main__.py
@@ -481,7 +481,7 @@ def run_argparse(argv: list[str], formatter: Any) -> argparse.Namespace:
     ap2.add_argument("--hardlink", action="store_true", help="prefer hardlinks instead of symlinks when possible (within same filesystem)")
     ap2.add_argument("--never-symlink", action="store_true", help="do not fallback to symlinks when a hardlink cannot be made")
     ap2.add_argument("--no-dedup", action="store_true", help="disable symlink/hardlink creation; copy file contents instead")
-    ap2.add_argument("--thickfs", metavar="REGEX", type=u, default="fat|vfat|ex.?fat|hpfs|fuse", help="filesystems which dont support sparse files")
+    ap2.add_argument("--thickfs", metavar="REGEX", type=u, default="fat|vfat|ex.?fat|hpfs|fuse|sdcardfs", help="filesystems which dont support sparse files")
     ap2.add_argument("--sparse", metavar="MiB", type=int, default=4, help="windows-only: minimum size of incoming uploads through up2k before they are made into sparse files")
     ap2.add_argument("--turbo", metavar="LVL", type=int, default=0, help="configure turbo-mode in up2k client; 0 = off and warn if enabled, 1 = off, 2 = on, 3 = on and disable datecheck")