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-rw-r--r--docs/pyboard/general.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/pyboard/general.rst b/docs/pyboard/general.rst
index 48e0146442..1d040f6ccc 100644
--- a/docs/pyboard/general.rst
+++ b/docs/pyboard/general.rst
@@ -10,7 +10,9 @@ is inserted into the slot, it is available as ``/sd``.
When the pyboard boots up, it needs to choose a filesystem to boot from. If
there is no SD card, then it uses the internal filesystem ``/flash`` as the boot
-filesystem, otherwise, it uses the SD card ``/sd``.
+filesystem, otherwise, it uses the SD card ``/sd``. After the boot, the current
+directory is set to one of the directories above.
+
If needed, you can prevent the use of the SD card by creating an empty file
called ``/flash/SKIPSD``. If this file exists when the pyboard boots
up then the SD card will be skipped and the pyboard will always boot from the