what is interface crc error write DMA EXT ?

CRC is cyclic redundancy check. It is a type of checksum used to detect errors on block transfers of data.

DMA is Direct Memory Access. Once disk drives got too fast to pass one word at a time through the processor, they did their transfers using DMA hardware, which stores or fetches that data directly from or to memory with no processor intervention, then gives the processor an "I'm done"Interrupt at the end.

EXT could be Extent, what blocks on a disk are taken up by a file, or it could be external, a reference to a drive outside your Mac.

If this is on transfers from/to the Internal Boot Drive, I would be suspicious that you were developing a bad SATA cable. Some MacBooks have seen this where the Internal SATA cable scrubs against the machined inside surface of the case.