Hi Darren,
You can delete the FXT files, assuming that you don’t intend to use the specific symbol & time-frame that the FXT file is for. If, for example, you are not back-testing in the 60-minute time-frame for EURUSD, you can delete EURUSD60_0.fxt.
Of course, if you wish to test with the 60-minute time-frame at a later date, you will need to regenerate this FXT file by exporting the 60-minute time-frame again.
Hope this helps.
