The phrase "ability to back up" is correct and usable in written English.
It can be used when discussing someone's capacity to support or reinforce a statement, argument, or action with evidence or data.
Example: "Her ability to back up her claims with solid research made her presentation very convincing."
Alternatives: "capacity to support" or "skill in substantiating".
Amazon itself offers users the ability to back up digital purchases without DRM in some, but not all, of its services.
I.B.M. said yesterday that it had begun shipping its Shark data storage systems for large computers and networks with a number of enhancements that improve its ability to back up data on the fly and work with non-I.B.M. equipment.
It adds that Griffin "has previously described the BNP as 'a strong, disciplined organisation with the ability to back up its slogan Defend Rights for Whites with well-directed boots and fists'".
"The electors did not back a postmodernist rightist party, but what they perceived to be a strong, disciplined organisation with the ability to back up its slogan 'Defend Rights for Whites' with well-directed boots and fists," he said.
The Chiefs secured back-to-back titles, thanks to a dramatic, come-from-behind 27-22 victoverover a tenacious Brumbies side in Hamilton on Saturday, and in the process defied those who doubted the team's ability to back up its success last year.
For decades, DVF has had the fashion industry eating out of her hand thanks to her peerless way with a quote about Being A Modern Woman, and her ability to back up aforementioned quotes with day-to-evening dresses that make you look hot and smart.
Older users appreciate clear design, access to drug information and the ability to back-up and share their profiles.
Another anticipated new feature coming with Yukimura (PS4 software version 2.50 if you want to get technical) is the ability to back-up and restore console HDD content to an external USB drive.
One of Trump's strengths is his ability to create statistics to back up his bullshit on the fly.
Without their protected profits and ability to call on Westminster to back up their trading practices with power, would Britain's economy have taken off 300 years ago?
Shaea, who was blindfolded and driven out to a remote area for his interview, said Wuhayshi was laconic but quick-witted, with flashes of sarcastic humor and a remarkable ability to adduce Koranic verses to back up anything he said.
