Duplicate writting data on W25Q256FV

[levkovigor]

Hello, I have the problem with writting data (bytes or strings or anything) on W25Q256FV. When I writeByte to address 256 it is written to address 256 and to address 16777472 (half size + 256). When I erase sector with address 16777472 - nothing is erased. When I erase first sector - - both sectors are erased. So my question is - is it ok, and I can use only half of memory or maybe I do something wrong? Or it is the problem with library and should be fixed?