Bought for mini sd formats which is becoming increasingly rare, I find that the design leaves something to be desired. The card and adapters are designed in a questionable quality plastic. The very look fragile, the card is particularly thin compared to those of Samsung in (for example). Performance level, the lot is reliable: used sd format mini sd and micro sd card password on all tested devices (including a particularly temperamental compatibility level), the transfer speed is very good, satisfied with my purchase but Board once logged avoid removing the card, do not over-handled because of its fragility.