/ .sync / IgnoreList
IgnoreList
 1  # IgnoreList is a UTF-8 encoded .txt file that helps you specify single files, paths and rules 
 2  # for ignoring during the synchronization job. It supports "?" and "*" wildcard symbols.
 3  #
 4  #
 5  # OS generated files #
 6  $RECYCLE.BIN
 7  $Recycle.Bin
 8  System Volume Information
 9  ehthumbs.db
10  desktop.ini
11  Thumbs.db
12  lost+found
13  .DocumentRevisions-V100
14  .TemporaryItems
15  .fseventsd
16  .icloud
17  .iCloud
18  .DS_Store
19  .DS_Store?
20  .Spotlight-V100
21  .Trashes
22  .Trash-*
23  ~*
24  *~
25  .~lock.*
26  *.part
27  *.filepart
28  .csync_journal.db
29  .csync_journal.db.tmp
30  *.swn
31  *.swp
32  *.swo
33  *.crdownload
34  .@__thumb
35  .thumbnails
36  ._*
37  *.tmp
38  *.tmp.chck
39  .dropbox
40  .dropbox.attr
41  .dropbox.cache
42  .streams
43  .caches
44  .Statuses
45  .teamdrive
46  .SynologyWorkingDirectory
47  @eaDir
48  @SynoResource
49  #SynoRecycle
50  #snapshot
51  #recycle
52  .!@#$recycle
53  DfsrPrivate