Ergosteryl beta-glucosidase involved in the ergosteryl beta-glucoside (EG) catabolic pathway and vacuole formation via hydrolysis of EG to generate glucose (PubMed:26116408). Is also able to hydrolyze cholesteryl beta-glucoside and sitosteryl beta-glucoside to generate glucose; and C6-7-nitro-2,1,3-benzoxadiazole (NBD)-GlcCer to generate C6-NBD-ceramide (Cer) (PubMed:26116408). ergosteryl 3-beta-D-glucoside + H2O = D-glucose + ergosterol Localizes in the cytosol until the initial logarithmic phase, then targets to a yet unidentified organelle with a granule structure in the middle logarithmic phase, and finally localizes at the vacuole membranes in the stationary phase. Resulted in the accumulation of ergosteryl beta-glucoside (EG) and fragmentation of vacuoles. Present with 1070 molecules/cell in log phase SD medium. Belongs to the glycosyl hydrolase 5 (cellulase A) family.