import gc
gc.threshold((gc.mem_free() + gc.mem_alloc()) // 4)
import uos
from flashbdev import bdev
try:
if bdev:
vfs = uos.VfsFat(bdev)
uos.mount(vfs, '/flash')
uos.chdir('/flash')
except OSError:
import inisetup
vfs = inisetup.setup()
gc.collect()