Track disk size

[kev1n80]

Implementation

• If using the disk size limit feature
  • Track the number of bytes written that do not have the .bad file extension with writeBytes
  • Write writeBytes to MetaData

Testing

• test that writeBytes increment after putting data
• test that writeBytes decrements when a file is completely read

Next PR

• implement disk size limit feature that will delete the oldest file first in order to make space

[leonzz]

LGTM