I would suggest the best way would be if you have a github account
then make a repository with the file there and share it with us here.
This would also allow for us to add it to our links of resources.

Thank you for your requests, I will make sure to hand them on to the dev
team. It is true that the updates on the offline version are lagging behind
the online version but we will try to improve this. Blockly allows for a rectractable
comment from the blocks so this shouldn't be hard to implement

We used to have blocks for handling the SD card in our old platform M5GO
so I don't see this as being too difficult to add either.

All the best, Keep us updated on the progress of your project.

This is my test program for writing and reading data to/from SD card:

Is there a possebility adding files at the posting? then i can add the Blockly-file here.

And last but not least a short whish list for improvements at UiFlow:

• Early implementation of the actual UiFlow-Beta-version to the UiFlow-PC-Version
• Adding remarks in a easy way, i took thererfore the execute block using a #
• Blocks for handling SD cards (reading, writing, appending data)
• Adding files in postings at the M5Stack community

from m5stack import *
from m5ui import *
from uiflow import *
import os

sd_mount()

timeSinceBoot = None
f = open("/sd/1.TXT", 'w+')

while True:
timeSinceBoot = time.ticks_ms()
if btnA.wasPressed():
f.write('{}\n'.format(timeSinceBoot))
wait_ms(100)
f.close()
wait_ms(2)

You may also check this for reference https://github.com/turbinenreiter/micropython/tree/master/examples/SDdatalogger