Miranda didn't wipe his hard drive after meeting with Laura Poitras because...?! It might've been safer to use Retroshare or Bittorent Sync or some other means

Miranda didn't wipe his hard drive after meeting with Laura Poitras because...?! It might've been safer to use Retroshare or Bittorent Sync or some other means of encrypted file sharing (with the files encrypted themselves, too). At least the government wouldn't really know what to look for. Miranda travelling with baggage and laptops with him was a huge "red flag" for them, and made him an obvious target.