problema SD 64 gb samsung

Salve ho comprato un sd ssamsung da 64 gb e ho fatto il test con H2testw e mi è uscito questo:

The media is likely to be defective.
121.1 MByte OK (248118 sectors)
62.3 GByte DATA LOST (130817738 sectors)
Details:62.3 GByte overwritten (130817738 sectors)
0 KByte slightly changed (< 8 bit/sector, 0 sectors)
0 KByte corrupted (0 sectors)
2 KByte aliased memory (4 sectors)
First error at offset: 0x0000000007926c00
Expected: 0x0000000007926c00
Found: 0x0000000007926400
H2testw version 1.3
Writing speed: 8.17 MByte/s
Reading speed: 12.8 MByte/s
H2testw v1.4

qualcuno puo aiutarmi?