Disk space is showing low using data services

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Hello experts,

I am using data services in my own laptop, when ever iam using data services designer tool

it showing my disk space is low, so i had deleted un-necessary data in my c-drive then i got 1.5gb free space and later i was open data services designer tool i created one job, then again it is showing low disk space, so the c-drive is showing free space is 5MB.

So could you please help me how increase space in my c-drive which files i have to delete,where i have to delete relevant to data services.