Salvare in MicroSd

Hello everyone,
after asking for read and write permission; I proceed to carry out through AppendToFile, the addition of various components within a CSV file .. obviously in the internal memory. Searching the community faqs; I read that up until a few years ago, it was not possible to be able to save inside a portable MicroSD, since it is a read-only memory. Is there any news on this right now?

this information is up-to-date, see also Some basics on Android storage system

2.2. External (removable / micro) SD card
There may also be another External Storage: a removable (micro) SD card, eg:


that can only be read (on devices with Android ≥ 4.4 / KitKat, API 19).


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