When I use the "File Manager", there is an option to "Delete", which I expected to allow me to clean off old files from the chip. (a HUZZAH). When I highlight a file and click Delete, nothing seems to happen and the file still appears in the File Manager list.
Also, when I edit files, say add new lines, then Save, the file seems to just append a full copy of the addition to whatever was there before. After two or three edits, the file spans several pages on the screen. Is this using up memory on the chip? If I manually erase the extra lines, everything seems to be OK.