diff --git a/copyparty/__version__.py b/copyparty/__version__.py
index 42363439..6345518a 100644
--- a/copyparty/__version__.py
+++ b/copyparty/__version__.py
@@ -1,8 +1,8 @@
 # coding: utf-8
 
-VERSION = (1, 8, 3)
+VERSION = (1, 8, 4)
 CODENAME = "argon"
-BUILD_DT = (2023, 7, 16)
+BUILD_DT = (2023, 7, 18)
 
 S_VERSION = ".".join(map(str, VERSION))
 S_BUILD_DT = "{0:04d}-{1:02d}-{2:02d}".format(*BUILD_DT)
diff --git a/copyparty/cfg.py b/copyparty/cfg.py
index 818955fd..7618324c 100644
--- a/copyparty/cfg.py
+++ b/copyparty/cfg.py
@@ -109,6 +109,7 @@ def vf_cmap() -> dict[str, str]:
         "nohash=\\.iso$": "skips hashing file contents if path matches *.iso",
         "noidx=\\.iso$": "fully ignores the contents at paths matching *.iso",
         "noforget": "don't forget files when deleted from disk",
+        "fat32": "avoid excessive reindexing on android sdcardfs",
         "dbd=[acid|swal|wal|yolo]": "database speed-durability tradeoff",
         "xlink": "cross-volume dupe detection / linking",
         "xdev": "do not descend into other filesystems",
diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index c9d2a1aa..c2aea8cc 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -3126,7 +3126,7 @@ def on40x(self, mods: list[str], vn: VFS, rem: str) -> str:
         return ""  # unhandled / fallthrough
 
     def scanvol(self) -> bool:
-        if not self.can_read or not self.can_write:
+        if not self.can_admin:
             raise Pebkac(403, "not allowed for user " + self.uname)
 
         if self.args.no_rescan:
@@ -3149,7 +3149,7 @@ def handle_reload(self) -> bool:
         if act != "cfg":
             raise Pebkac(400, "only config files ('cfg') can be reloaded rn")
 
-        if not [x for x in self.wvol if x in self.rvol]:
+        if not self.avol:
             raise Pebkac(403, "not allowed for user " + self.uname)
 
         if self.args.no_reload:
@@ -3159,7 +3159,7 @@ def handle_reload(self) -> bool:
         return self.redirect("", "?h", x.get(), "return to", False)
 
     def tx_stack(self) -> bool:
-        if not [x for x in self.wvol if x in self.rvol]:
+        if not self.avol and not [x for x in self.wvol if x in self.rvol]:
             raise Pebkac(403, "not allowed for user " + self.uname)
 
         if self.args.no_stack:
diff --git a/copyparty/up2k.py b/copyparty/up2k.py
index 044bdcb7..08d83b70 100644
--- a/copyparty/up2k.py
+++ b/copyparty/up2k.py
@@ -883,6 +883,7 @@ def _build_file_index(self, vol: VFS, all_vols: list[VFS]) -> tuple[bool, bool]:
         rei = vol.flags.get("noidx")
         reh = vol.flags.get("nohash")
         n4g = bool(vol.flags.get("noforget"))
+        ffat = "fat32" in vol.flags
         cst = bos.stat(top)
         dev = cst.st_dev if vol.flags.get("xdev") else 0
 
@@ -919,6 +920,7 @@ def _build_file_index(self, vol: VFS, all_vols: list[VFS]) -> tuple[bool, bool]:
                     rei,
                     reh,
                     n4g,
+                    ffat,
                     [],
                     cst,
                     dev,
@@ -974,6 +976,7 @@ def _build_dir(
         rei: Optional[Pattern[str]],
         reh: Optional[Pattern[str]],
         n4g: bool,
+        ffat: bool,
         seen: list[str],
         cst: os.stat_result,
         dev: int,
@@ -1018,7 +1021,7 @@ def _build_dir(
 
             lmod = int(inf.st_mtime)
             sz = inf.st_size
-            if fat32 and inf.st_mtime % 2:
+            if fat32 and not ffat and inf.st_mtime % 2:
                 fat32 = False
 
             if stat.S_ISDIR(inf.st_mode):
@@ -1035,7 +1038,19 @@ def _build_dir(
                 # self.log(" dir: {}".format(abspath))
                 try:
                     ret += self._build_dir(
-                        db, top, excl, abspath, rap, rei, reh, n4g, seen, inf, dev, xvol
+                        db,
+                        top,
+                        excl,
+                        abspath,
+                        rap,
+                        rei,
+                        reh,
+                        n4g,
+                        fat32,
+                        seen,
+                        inf,
+                        dev,
+                        xvol,
                     )
                 except:
                     t = "failed to index subdir [{}]:\n{}"