diff --git a/caiman/mmapping.py b/caiman/mmapping.py
index 65dd10cf4..ce4b040e8 100644
--- a/caiman/mmapping.py
+++ b/caiman/mmapping.py
@@ -405,7 +405,7 @@ def save_memmap(filenames:list[str],
                 recompute_each_memmap = True
 
 
-        if recompute_each_memmap or (remove_init>0) or (idx_xy is not None)\
+        if recompute_each_memmap or (remove_init > 0) or (idx_xy is not None)\
                 or (xy_shifts is not None) or (add_to_movie != 0) or (border_to_0>0)\
                 or slices is not None:
 
@@ -527,7 +527,7 @@ def save_memmap(filenames:list[str],
             sys.stdout.flush()
             Ttot = Ttot + T
 
-        fname_new = caiman.paths.fn_relocated(fname_tot + f'_frames_{Ttot}.mmap')
+        fname_new = os.path.join(caiman.paths.get_tempdir(), caiman.paths.fn_relocated(f'{fname_tot}_frames_{Ttot}.mmap'))
         try:
             # need to explicitly remove destination on windows
             os.unlink(fname_new)
diff --git a/caiman/motion_correction.py b/caiman/motion_correction.py
index a819fff95..d2e9b6bef 100644
--- a/caiman/motion_correction.py
+++ b/caiman/motion_correction.py
@@ -167,9 +167,12 @@ def __init__(self, fname, min_mov=None, dview=None, max_shifts=(6, 6), niter_rig
 
         """
         if 'ndarray' in str(type(fname)) or isinstance(fname, caiman.base.movies.movie):
-            logging.info('Creating file for motion correction "tmp_mov_mot_corr.hdf5"')
-            caiman.movie(fname).save('tmp_mov_mot_corr.hdf5')
-            fname = ['tmp_mov_mot_corr.hdf5']
+            mc_tempfile = os.path.join(caiman.paths.get_tempdir(), 'tmp_mov_mot_corr.hdf5')
+            if os.path.isfile(mc_tempfile):
+                os.remove(mc_tempfile) # Eventually get_tempdir() will keep jobs separate and make this safer
+            logging.info(f"Creating file for motion correction: {mc_tempfile}")
+            caiman.movie(fname).save(mc_tempfile)
+            fname = [mc_tempfile]
 
         if not isinstance(fname, list):
             fname = [fname]