excel for mac（16.19） ::Microsoft Excel cannot access the file

Microsoft Excel cannot access the file '/Volumes/[G] Windows 10.hidden/Document/技术部月度考核/1D678110'. There are several possible reasons: • The file name or path does not exist. • The file is being used by another program. • The workbook you are trying to save has the same name as a currently open workbook.

but 

excel 16.15 version can save.