ZyXEL NSA-220 Plus User Guide - Page 166
USB <-> NSA, Before Sync, After Sync
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Chapter 7 Applications USB NSA When you synchronize files in both directions simultaneously, both storage devices transfer unique files to one another. Files with the same file name are synchronized according to their modification date/time. The difference in modification time between the two files has to be greater than five minutes. More recently modified files overwrite the older ones during synchronization. The following figure illustrates how synchronization works when you synchronize files in both directions simultaneously. Figure 54 Synchronizing Files Example 2 Before Sync USB NSA A BC (new) After Sync USB AB D (new) NSA A BC D (new) (new) A BCD (new) (new) A on the USB device and B on the NSA are modified more recently. • File A from the USB device replaces file A on the NSA. • File B from the NSA replaces file B on the USB device. • A copy of file C from the USB device is transferred to the NSA. • A copy of file D from the NSA is transferred to the USB device. 166 NSA-220 Plus User's Guide