Hi All, I'm new here but I'm racking my brains and I can't work out what to do. I've been backing up to a NAS drive (WD My Cloud) with time machine. I no longer have access to the location where the NAS drive is located so have logged in and downloaded the backup file "Sam's iMac.sparsebundle" via a windows PC. It's downloaded as an 18Gb file named "Sam's iMac.sparsebundle.zip". I've tried unzipping it without success, although I've been pretty impatient with waiting from it to unzip. The data on here is pretty crucial, so I wanted to ask your advice on how best to access it? I'm aware I probably need to format an external hard drive to HFS+ but not sure on what process I should be using to get to a usable backup that I can access on my mac. Really hope you guys can help!!! --- Post Merged, Feb 8, 2017 --- I've been a little more patient and have recieved the following message after trying to unzip the file on my windows laptop. "Cannot open the file a zip archive is not an archive"