I have imported 2 point features of small size but I couldn't upload a polygon feature which is about 3.25 MB in .zip format. The number of features are around 930, .shp, .shx, .prj, .dbf and other associated files are included directly in the .zip root. I even tried to upload without the extra extensions like .sbn. It is in WGS 1984 (also tried UTM).
It is showing the error "Unable to import this shapefile (Timeout exceeded)". I was thinking that it can be internet speed problem, but I tried a high speed network for this and no use from it.
Please help.