Flash drive, memory card not saving data

Hello,

Hi, I bought 2 different 256Gb mini sd cards from Wish online shopping, 1 was verbatim make. Both they have same problem, when ever I load music, pictures, or videos they disappear as soon as they exceed 10Gb, above that only undeleteable folders stay. Then I bought 2 × 2Tb flash drives, still from Wish online shopping, they also do have the same problem of being unable to contain whatever it is I store in them as long it is more than 10Gb. Please help on how to solve this problem.