Onyx Boox Poke5P User Manual page 25

Storage Settings, with a default size of 150MB and a
maximum size of 300 MB.
Some Cloud Storage may have monthly quota limits. If you
encounter errors such as being unable to download or
upload, please check for network issues first, then confirm
with the Cloud Storage providers whether they have a limit
quota.
Filter and sort
Apply to all eBooks by default
and sort by the recent reading
time in descending order;