This means that if you changed a large file multiple times during the day, Backblaze would only backup one copy every other day. You’re unlikely to have (m)any files over 30 MB anyway, except your Outlook data file and perhaps some PowerPoint slides. However, it will take one revision every 48 hours for files over 30 MB in size. Backblaze will backup, and keep revisions, of all files whenever they are created or updated – and it’ll keep every revision for 30 days.For other people though – where you download email via POP3 and store it in PST data files, I have a workaround which can take a copy of your data files and lets Backblaze back those up. Not everyone who uses Outlook needs its data file to be backed up (if you use Microsoft Exchange, or email via Office 365 or Google G Suite, you don’t). Essentially, if Outlook is open, Backblaze can’t back up its data file. The only files that regularly fall into this category in my testing are Outlook PST data files. Backblaze cannot back up a file that is “exclusively locked”.Even external hard drives or USB flash drives: you can back up anything that is connected directly to your PC, but network drives – no. If the hard drive is on your PC, you can back it up. You can’t trick or beat it, it knows what you’re trying to do, and has been taught how to identify a shared network drive. Backblaze will not allow you to back up a network drive.Each of the three things it can’t (or won’t) do can be worked around once you know that they’re there. Backblaze has three small downsides – so make sure that you are happy with them before you jump in. There were good and bad things about every backup system that I trialled.
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