Found SD Card Has AVCHD, BIN, and XML Files That Won't Open: What Now?
Do not keep opening files from the card on your personal or work computer. In this r/datarecovery case, someone found a 128GB SD card in the trash at work, took it home, and tried Unarchiver, Adobe Media Encoder, Word, and other apps because the card contained AVCHD, BIN, and XML files that all appeared unsupported. The card is readable, so this is not a data-recovery problem yet. The immediate issue is that it is unknown removable media.
Do This First
Stop exploring the found card and return it to the appropriate IT or security contact at the workplace. CISA advises users not to connect found storage media to a PC because unknown removable devices can carry malware or sensitive organizational data.
Why Do the AVCHD, BIN, and XML Files Say Unsupported?
Because the files being opened may not be the actual video clips. AVCHD is a folder-based recording structure, not a single movie file. Sony documents camera video inside paths such as /PRIVATE/AVCHD/BDMV/STREAM/00000.MTS. The surrounding folders can contain supporting data used by the camera or AVCHD structure, so trying to open every BIN or XML file as a movie can simply produce an unsupported-format message.
Where Is the Actual Video on a Trusted AVCHD Card?
Check the Folder Tree
- You find
AVCHD/BDMV/STREAMwith.MTSfiles: those are the clips to copy and open with an MTS-compatible player or editor. - You only see BIN/XML and no
STREAMclips: do not rename those files to.MTS. First confirm that you are viewing the complete folder hierarchy. - This is your own trusted card and the expected
.MTSfiles are actually missing: then the situation becomes a recovery case. Stop writing to the card before scanning for lost video files.
If you are working with your own trusted AVCHD media and need help identifying or opening the clips, the broader MTS file guide explains the format and compatible playback options. For the Reddit scenario itself, though, the next step is not another codec, converter, or recovery app—it is to stop opening a found workplace SD card and hand it back to IT or security.