5/12/2023 0 Comments Zosi view for mac![]() ![]() Note: to perform this process, you will want to use a USB 2.0 drive ideally 16 GB or less in size, formatted in FAT32. ![]() (Please save the upgrade file rootfs-3520dv400 in the root directory, not save it under any other folders.) You can follow up the guide below to upgrade the DVR:ġ) You needn’t open the upgrade file, please directly download the upgrade file and save it to your U-disk. ![]() ![]() If your DVR’s label is lost, please go to DVR’s Main Menu – Information – System to take a photo to us, we will send the correct upgrade file to you. You can find your DVR’s model number on the label at the bottom of your DVR. ![]()
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