diff --git a/copyparty/__main__.py b/copyparty/__main__.py
index a3f26af4..8e8cb6c5 100755
--- a/copyparty/__main__.py
+++ b/copyparty/__main__.py
@@ -808,6 +808,8 @@ def add_upload(ap):
     ap2.add_argument("--no-dedup", action="store_true", help="disable symlink/hardlink creation; copy file contents instead (volflag=copydupes)")
     ap2.add_argument("--no-dupe", action="store_true", help="reject duplicate files during upload; only matches within the same volume (volflag=nodupe)")
     ap2.add_argument("--no-snap", action="store_true", help="disable snapshots -- forget unfinished uploads on shutdown; don't create .hist/up2k.snap files -- abandoned/interrupted uploads must be cleaned up manually")
+    ap2.add_argument("--snap-wri", metavar="SEC", type=int, default=300, help="write upload state to ./hist/up2k.snap every SEC seconds; allows resuming incomplete uploads after a server crash")
+    ap2.add_argument("--snap-drop", metavar="MIN", type=float, default=1440, help="forget unfinished uploads after MIN minutes; impossible to resume them after that (360=6h, 1440=24h)")
     ap2.add_argument("--u2ts", metavar="TXT", type=u, default="c", help="how to timestamp uploaded files; [\033[32mc\033[0m]=client-last-modified, [\033[32mu\033[0m]=upload-time, [\033[32mfc\033[0m]=force-c, [\033[32mfu\033[0m]=force-u (volflag=u2ts)")
     ap2.add_argument("--rand", action="store_true", help="force randomized filenames, --nrand chars long (volflag=rand)")
     ap2.add_argument("--nrand", metavar="NUM", type=int, default=9, help="randomized filenames length (volflag=nrand)")
diff --git a/copyparty/up2k.py b/copyparty/up2k.py
index 7f255783..b600c2fa 100644
--- a/copyparty/up2k.py
+++ b/copyparty/up2k.py
@@ -134,8 +134,6 @@ class Up2k(object):
         self.vol_act: dict[str, float] = {}
         self.busy_aps: set[str] = set()
         self.dupesched: dict[str, list[tuple[str, str, float]]] = {}
-        self.snap_persist_interval = 300  # persist unfinished index every 5 min
-        self.snap_discard_interval = 21600  # drop unfinished after 6 hours inactivity
         self.snap_prev: dict[str, Optional[tuple[int, float]]] = {}
 
         self.mtag: Optional[MTag] = None
@@ -3745,13 +3743,16 @@ class Up2k(object):
             self._finish_upload(job["ptop"], job["wark"])
 
     def _snapshot(self) -> None:
-        slp = self.snap_persist_interval
+        slp = self.args.snap_wri
+        if not slp or self.args.no_snap:
+            return
+
         while True:
             time.sleep(slp)
             if self.pp:
                 slp = 5
             else:
-                slp = self.snap_persist_interval
+                slp = self.args.snap_wri
                 self.do_snapshot()
 
     def do_snapshot(self) -> None:
@@ -3765,11 +3766,8 @@ class Up2k(object):
         if not histpath:
             return
 
-        rm = [
-            x
-            for x in reg.values()
-            if x["need"] and now - x["poke"] > self.snap_discard_interval
-        ]
+        idrop = self.args.snap_drop * 60
+        rm = [x for x in reg.values() if x["need"] and now - x["poke"] >= idrop]
 
         if self.args.nw:
             lost = []