I nead help with save and share a file from Text

[TIMAI2]

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Saving data format

Good Day All, I have virtually completed my little Unit Price app, and am refining saving of data. But things have suddenly changed markedly. Up to recent I used the '/filename' system which worked well on all my devices. Then, after googles security update system this no longer works as cannot access SD card. There is no need for me to have any specific directory or folder, and, to configure only for sd card. When I changed to saving simply 'filename' it works without question on all my devices…