I decided to check the targets like the TWRP backup will do (Flash Toshiba 64GB EXFAT / GPT) .Backup was created, everything is OK.De and forgot for him. Today I think, delete, the data have changed, and it is not deleted. And flash says that it is good and all that , it seems everything is read, there are no problems. I have not found in the PC (he also did not find errors) and then ...-
What can be? (bad that there is no Mass Storage mode, the USB flash drive can be pulled out)