A "1TB" USB stick from an unreliable brand might only have 64GB of real NAND. The V100 will report success until it hits the physical limit, then corrupt data. Always test drives with before using them in double-space mode.
For users needing a simple, button-operated device to duplicate data across two USB ports or a USB + SD card, the V100 performs reliably. It does not “double” storage capacity in a compression or virtual expansion sense, but it efficiently creates two full copies, doubling redundancy. sdata tool v100 double usb or sd card space
Most users solve low storage by buying larger SD cards or USBs. The SDATA Tool V100 offers a different approach. A "1TB" USB stick from an unreliable brand
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Note: Not recommended for continuous 4K video writing due to compression overhead.
Files copied to the "virtual" space (the space that does not physically exist) are not actually stored. When the user attempts to open these files later, they will encounter errors such as "File corrupted" or "Invalid file format." The file system (FAT32/exFAT/NTFS) becomes inconsistent because the File Allocation Table records file chains that do not exist on the physical media.