This is the most common cause. Your download was interrupted, leaving the central directory incomplete.
If your firmware ends in .ozip , the Realme Flash Tool will almost certainly fail. You need to convert it to .ofp . cannot find central directory realme flash tool full
If the official Realme Flash Tool refuses to cooperate, ditch it entirely. Use generic Qualcomm tools. This is the most common cause
If your hard drive has bad sectors, any file stored on that sector becomes partially unreadable. The central directory of your firmware file might be sitting on a bad sector. cannot find central directory realme flash tool full