sizeInBytes property
The latest known metered size (in bytes) of data stored in the file system,
in its Value field, and the time at which that size was
determined in its Timestamp field. The Timestamp
value is the integer number of seconds since 1970-01-01T00:00:00Z. The
SizeInBytes value doesn't represent the size of a consistent
snapshot of the file system, but it is eventually consistent when there are
no writes to the file system. That is, SizeInBytes represents
actual size only if the file system is not modified for a period longer than
a couple of hours. Otherwise, the value is not the exact size that the file
system was at any point in time.
Implementation
final FileSystemSize sizeInBytes;