The whole content of my Transcend USB flash drive has disappeared after targeted scan. Avast suggested that the one threat found be transferred to quarantine, I agreed. After that, when I tried to open my Transcend flash drive, it was completely empty except for one file (5 kb ) with the extension tmp. Where is everything? The drive was almost full, I printed several files from it in a copy shop 3 hrs ago. What should I do to retrieve all my content?