The storage space you see is not your actual data. It is a small "technological volume" built into the controller for service tasks.
If your card is showing this file and has lost its capacity, standard formatting rarely works. You can try these professional-grade recovery steps: 1. Verify Hardware Status Check if the issue is with the card or the reader. sd+card+uupdbin
#define CHUNK_SIZE 4096
," as "uupd.bin" is not a standard file system component or industry protocol. Instead, it is a specific file associated with bootleg (fake) SD cards or corrupted firmware in niche handheld gaming devices. The storage space you see is not your actual data