Unfortunately, DEP was already disabled on our test environment-leaving us with a troubling acknowledged-but-not-fixed two-year-old bug that could seriously impact backups. And when we investigated further, we found a two-year-old Reddit post pointing the finger at Data Execution Prevention, with an Arq employee promising to "work on that." We tried manually installing the Visual C++ Runtime to fix the error, but that had no effect. Making matters worse, the app has unfixed long-standing errors-although backups worked, we noticed VSS (Volume Snapshot Service, aka Shadow Copy) errors in the logs, which heavily imply potential problems with backups of currently open files. Unfortunately, when using Arq's own storage back end, the service is very expensive-$60 per year isn't bad by itself, but when you factor in the 1TB limit and the five-device limit, we don't imagine many Ars readers making it work without additional costs. We also like that Arq can be targeted to a number of different back-end storage platforms, including self-hosted ones. The app is easy to navigate while still having plenty of features, and backup speeds were decent.
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