Hii Caty this is a copy of a question in tutorials but maybe more appropriate here, please delete whichever is the incorrect place.

Just had a read of making room but no answer to this directly. When one updates manually the ASR and JCV files can you safely delete the existing ones ASR for Europe takes up a huge amount of room as does JCV. AS I have not had a unit capable of these before I assume that if I did a download from Garmin it would automatically delete old files, but how do I tell what is old. FoR eg most of my existing ASR files start 01XSUI--.asr new with O1YA153(E-V).asr plus other variations, is it a safe assumption that X is replaced by Y
JCV files old D2504010A new d2504020A this again would seem to be logical to get rid of the 010 version. Same for .dbs files out with the old in with the new??? Before I go following my inuition answers would be appreciated